alepinkbear9 alepinkbear9

25-04-2020
Mathematics

contestada

Which expression is a factor of x^2 + 2x – 15?

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edyg144 edyg144

25-04-2020

To factor this you need values that add up to 2 and multiply to -15

So you get 5,-3 then you put it into your equation for you b value

X^2+5x-3x-15

Then you can factor by grouping

X(x+5)-3(x+5)

So your factors are

(X+5)(x-3)

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