Question

find the value of a,if 8x² -7 x +a=o for x = -1​

Answer 1

Answer:

IF X = -1

8X² - 7X + A = 0

8 (-1)² - 7(-1) + A = 0

8 + 7 + A = 0

15 + A = 0

A = -15

Answer 2

Given: [tex]8x^{2}-7x+a = 0\\ [/tex]

            $x = (-1)$

To find:  value of a

Step-by-step explanation:

$8x^{2} -7x+a = 0$

Putting value of $x=-1$

[tex]8(-1)^2-7(-1)+a = 0\\ 8+7+a = 0\\ 15+a = 0\\ a = -15[/tex]