Question

3. If A = 3x2 - 7x - 8 and B = x2 - 5x -4,
find 2A + B.​

Answer 1

Answer:

2A + B

2(3×2-7x) + (2x-5x-4)

12-14x +(-3x-4)

12-14x-3x-4

12-4-17x

8-17x.

maybe this is your answer.

Answer 2

Given:

A = 3$x^2$ - 7x - 8 and B =

We have to find, the value of  2A + B.

Solution:

∴ 2A + B

= 2(3$x^2$ - 7x - 8) + (

= 6$x^2$ - 14x - 16 +

= 7$x^2$ - 19x - 20

∴ 2A + B = 7$x^2$ - 19x - 20

Thus, 2A + B = 7$x^2$ - 19x - 20