How would you do: x^2-11x+30 = (x+a)(x-6) ?

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How would you do: x^2-11x+30 = (x+a)(x-6) ?

Guest May 7, 2014

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Best Answer

+118724

+8

x^2-11x+30

to factorise this you need two numbers that multiply to +30 (they must have the same sign)

and add to -11

ok -5 and -6 work

(x-5)(x-6)=(x+a)(x-6)

a=-5

Melody May 8, 2014

1⁺⁰ Answers

+118724

+8

Best Answer

x^2-11x+30

to factorise this you need two numbers that multiply to +30 (they must have the same sign)

and add to -11

ok -5 and -6 work

(x-5)(x-6)=(x+a)(x-6)

a=-5

Melody May 8, 2014

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