Question

Evaluate 3x^2-1 when x=2

Answer 1

3x^2-1, x=2

3(2)^2-1

3(4)-1

12-1

11

When x=2, 3x^2-1=11.

Answer 2

Hey there,

3x^2 - 1 (x = 2)

Plug in 2 for x

3(2)^2 - 1

Do the exponent

3(4) -1

Multiply and the subtract

12 -1 = 11

The answer would be 11

Hope I helped :)

~Char