Question

The sum of roots of a quadratic equation x2+4x -320 = 0 is _____.

Answer 1

sum of roots in ax2 + bx + c = 0 is = -b/a i.e. -coffecient of x /coffecient if x2

Answer 2

Root 1 = 16
P(x) = (16)^2+4(16)-320
P(x) = 256+64-320
=0

Root 2 = -20
P(x) = (-20)^2+4(-20)-320
P(x) = 400-80-320
= 0

Root 1 + Root 2
16+(-20)
16-20
-4

HOPE YOU FOUND THIS HELPFUL !!!