girlb8830 girlb8830
  • 30-07-2020
  • Mathematics
contestada

Evaluate 3x2 - 4 when x = 2.
A. 12
B. 32
c. 2
D. 8

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 30-07-2020

Answer:

8

Step-by-step explanation:

3x^2 - 4

Let x = 2

3 * 2^2 -4

Exponents first

3 *4 -4

Then multiply

12 -4

Now subtract

8

Answer Link
ProfessorAlvarez
ProfessorAlvarez ProfessorAlvarez
  • 30-07-2020

[tex]\text{Plug in and solve:}\\\\3(2)^2-4\\\\3(4)-4\\\\12-4\\\\8\\\\\boxed{\text{D). 8}}[/tex]

Answer Link

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