Question

if 4 is the root of quadratic equation X square + a x - 8 =0
find a​

Answer 1

Step-by-step explanation:

if 4 is one of root so it will satisfy following equation.

x^2 +ax -8 = 0

16 + 4a -8 = 0

(a = -1)

Hope it helps you buddy

Answer 2

x^2+ax-8=4

answer is 4