Question

Find the value of a,if 8x²-7x+a =0 for x= - 1.​

Answer 1

Answer:

 a= - 15

Step-by-step explanation:

8x²-7x+a =0

8(-1)²-7(-1) +a=0

        8x1+7+a=0

           8+7+a=0

             15+a=0

                   a=0-15

                   a= - 15

HOPE IT HELPS !!

Answer 2

Answer:

The value of $a=$$-15$

Step-by-step explanation:

Since it is given that $x=-1$ is a root for the equation $8x^{2} -7x+a=0$,

we can write

$8(-1^{2} )-7(-1)+a=0$

$8(1)+7+a=0$

$15+a=0\\a=-15$.

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