Question

Y²+y-20 can sb answer this

Answer 1

(y + a)(y + b) = y^2 + (a + b)y + ab
We need two factors of -20 that sum to +1
That would be 5 and -4
y^2 + y - 20 = (y + 5)(y - 4)

Answer 2

STEP ONE.

Use the sum-product solution.

y² + y - 20

y² + 5y - 4y - 20

STEP TWO.

Common factors from the pairs.

y² + 5y - 4y - 20

y (y + 5) - 4 (y + 5)

STEP THREE.

Rewrite in factored form.

y (y + 5) - 4 (y + 5)

(y - 4) (y + 5)

SOLUTION

(y - 4) (y + 5)

Explanation:

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