Question

a quadratic polynomial whose roots are 5 and -8​

Answer 1

Answer:

x²+3x-40

Step-by-step explanation:

x = 5 => x-5 = 0 and x = -8 => x+8 =0

combining both,

(x-5) (x+8) =0

x(x+8) -5 (x+8) =0

x²+8x-5x-40=0

x²+3x-40=0