Question

Find the value of the following expression 2b²+ 3b- 7 at b=-2​

Answer 1

Answer:

$2 {b}^{2} + 3b - 7 \\ = 2 {( - 2)}^{2} + 3( - 2) - 7 \\ = 2 \times 4 - 6 - 7 \\ = 8 - 6 - 7 \\ = - 5$

Answer 2

Answer:

-5

Step-by-step explanation:

2×(-2)(-2) + 3×(-2)-7

8-6-7

2-7

-5