Question

Which equation could be used to solve y^2+7y=18 by factoring?

y(y + 7) = 18
(y + 2)(y + 9) = 0
(y + 9)(y - 2) = 0

Answer 1

y^2+7y=18

y^2+7y-18 = 0

now find two numbers that multiply to -18 and add to 7 to help factor the left side

Answer 2

Huh?

Answer 3

let me try

y^2+7y=18
y^2+7y-18=0
(y + 9) (y - 2) = 0

so the answer is (y + 9)(y - 2) = 0

Answer 4

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