Question

Is x = 1 is the root of quadratic equation x

2

+ 7x -8 = 0 ?​

Answer 1

Answer:

2+7x-8

2+7×1-8

2+7-8

9-8

1

Answer 2

Answer:

Step-by-step explanation:

x² + 7x - 8 = 0

x² +8x - 1x - 8 = 0

x ( x + 8) - 1 ( x+ 8) = 0

(x-1) (x+8) = 0

(x-1) = 0 and (x+8) = 0

x = 1 and x = -8

x² +7x - 8 = 0

then its roots are (x-1) and (x+8)