Question

Evaluate 3x^2 – 4 when x = 2.

A. 12
B. 2
C. 8
D. 32

Answer 1

When x = 2
3x^2 = 3*4 = 12
12-4 = 8
C. is the answer

Answer 2

C ) 8.

Explanation:

Given: 3x^2 – 4 when x = 2.

To find: Evaluate.

Solution: We have given that 3x²– 4

For x =2.

3(2)²– 4.

On solving the power of 2.

3 (4) - 4.

12 - 4 .

On subtracting 4 form 12

8

Therefore, C ) 8.