Question

find the value of a. if 6x²-3x+a=-8,for x =4
answer should be -92
answer it in step by step.​

Answer 1

Answer:

$6 {x}^{2} - 3x + a = - 8$

$\implies \: 6 {(4)}^{2} - 3(4) + a = - 8$

$\implies \: 6 \times 16 - 12 + 8 = - a$

$\implies \: 96 - 4 = - a$

$\implies \: 92 = - a$

$\implies \: a = - 92$

Answer 2

Answer:

$6 {x}^{2} - 3x + a = - 8$

$\implies \: 6 {(4)}^{2} - 3(4) + a = - 8$

$\implies \: 6 \times 16 - 12 + 8 = - a$

$\implies \: 96 - 4 = - a$

$\implies \: 92 = - a$

$\implies \: a = - 92$