Question

what should be the value of a if the value of 3x square+ 5 x+ a is -2 for x=-2​

Answer 1

Step-by-step explanation:

$3 {x}^{2} + 5x + a = - 2 \\ \\ 3 {( - 2)}^{2} + 5 \times ( - 2) + a = - 2 \\ \\ 3 \times 4 - 10 + a = - 2 \\ \\ 12 - 10 + a = - 2 \\ \\ 2 + a = - 2 \\ \\ a = - 2 - 2 \\ \\ a = - 4$

Answer 2

Answer:

Putting the value of x=-2.

Then we have,

3(-2)×(-2)+5(-2)+a=-2

12-10+a=-2

2+a=-2

a=(-2)+(-2)

a=-4

Hope it helps you.