Answer:
x²+x-56
Step-by-step explanation:
If x=-8 and x=7 are the roots then x+8 and x-7 are the factors. Find the product of the factors to obtain the polynomial.
(x+8)(x-7)
x²-7x+8x-56
x²+x-56
Similarly,we could use Vieta's formula
x²-(sum of roots)x+(product of roots)
x²-(-8+7)x+(-8×7)
x²-(-1)x+(-56)
x²+x-56
