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  • Smart Learning for All.

  • Solving quadratic equations using quadratic formula.

  • Quadratic formula works for equations which are hard to factorize, or which do not have real roots.

  • Quadratic equation is of the form ax square plus bx plus c is equal to 0.

  • By quadratic formula, we get.

  • Let us solve following equations by quadratic formula.

  • 2x square plus x minus 5 is equal to 0.

  • Here a is equal to 2, b is equal to 1, c is equal to -5.

  • 5x square minus 2x plus 7 is equal to 0.

  • Here a is equal to 5, b is equal to -2, c is equal to 7.

  • Therefore, 5x square minus 2x plus 7 is equal to 0 does not have any real roots.

  • The End.

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Smart Learning for All.

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B1 US quadratic equal formula square equation solving

Quadratic Equations | #aumsum

  • 6 0
    AumSum posted on 2019/04/15
Video vocabulary

Keywords

subscribe

US /səbˈskraɪb/

・

UK /səb'skraɪb/

  • verb
  • To regularly pay to receive a service

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formula

US /ˈfɔrmjələ/

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UK /'fɔ:mjələ/

  • noun
  • A symbolic representation of the composition of a chemical compound.
  • The ingredients and their proportions in a mixture, especially a cosmetic or pharmaceutical product.
  • A mathematical or scientific rule
  • A mathematical relationship or rule expressed in symbols.
  • A method or procedure followed to achieve something.
  • Plan, rule or method for doing or making something
  • other
  • A milk substitute for babies.

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form

US /fɔrm/

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UK /fɔ:m/

  • noun
  • Sports team or person's current winning record
  • Document you complete when making an application
  • Visible shape or style; type; kind
  • verb
  • To organize something such as a club or group
  • To develop; to come into a shape or substance
  • To make something into a particular shape

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equal

US /ˈikwəl/

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UK /'i:kwəl/

  • other
  • To be the same in value or amount to (something else)
  • noun
  • A person or thing that is the same as another in status or quality
  • adjective
  • Same in shape, size, or number
  • verb
  • To add up or be the same as

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equation

US /ɪˈkweʒən, -ʃən/

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UK /ɪˈkweɪʒn/

  • noun
  • A statement that the values of two mathematical expressions are equal (indicated by the sign =)
  • A symbolic representation of a chemical reaction using chemical formulas.
  • Mathematical statement showing things to be equal
  • A statement that two expressions are equal, often written with an equals sign.
  • Complex set of different facts, ideas or issues
  • A state of equilibrium or balance; a harmonious relationship.
  • A complex of factors influencing a situation.

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square

US /skwɛr/

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UK /skweə(r)/

  • noun
  • Shape with 4 equal length sides and 4 equal angles
  • The result of multiplying Length by the width
  • Open public area in the middle of the town
  • adjective
  • Being fair or honest
  • Multiply a number by itself e.g. 2x2 or 6x6
  • adverb
  • In an honest or direct way
  • verb
  • To make something balance or be equal
  • To multiply a number by itself, e.g. 2x2 or 6x8
  • To straighten the edge to form a four-sided shape

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solve

US /sɑ:lv/

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UK /sɒlv/

  • verb
  • To figure out a way to handle a difficult problem

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channel

US /ˈtʃænəl/

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UK /'tʃænl/

  • noun
  • Long hole dug in the ground, e.g. to move water
  • TV or radio station or its programs
  • A groove or passage along which something may pass.
  • Method or way of sending or receiving information
  • A means of communication or information.
  • A means of communication or access.
  • A television station.
  • Narrow passage through which water travels
  • Method or route used for sending or getting things
  • verb
  • To dig a long hole for carrying water
  • To send (e.g. money) to a certain place or person
  • To direct water or liquid through a passage
  • To direct energy or feelings into something
  • other
  • Direct (money or resources) towards a particular aim or purpose.
  • To serve as a medium for expressing (something)

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learn

US /lɚn/

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UK /lɜ:n/

  • verb
  • To get knowledge or skills by study or experience
  • To gain knowledge or skill by studying, from experience, or by being taught.
  • other
  • To gain knowledge or skill by studying, from experience, or by being taught.
  • other
  • To gain knowledge or skill by studying, from experience, or by being taught.
  • To find out something.
  • To find out something.

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hard

US /hɑː(r)d/

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UK /hɑ:d/

  • adjective
  • Difficult to do; difficult to understand
  • (Of facts) not able to be misunderstood; clear
  • (Of alcohol) strong
  • Involving or requiring lots of work, effort, care
  • Being full of pain, trouble, and problems
  • Strong
  • (Of edge) clear; sharp
  • Difficult to bend, break or cut; solid
  • adverb
  • With lots of force, power, or impact

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