Question

Evaluate 3b2 when b= 4 and when b= - 4.
When b=4, 3b2

Answer 1

both values are 48

Explanation:

Substitute b = 4 and b = - 4 into the expression

3b²

= 3(4)² = 3 × 16 = 48

= 3(- 4)² = 3 × 16 = 48

Answer 2

24

Explanation:

3 times 4 times 2

3 times 4 is 12

12 times 2 is 24

Hope this helps you