Solve for x. 3x ^2 - 4 = 8

Question

Mathematics

Amirah Wolfe

Today, 06:09

Solve for x. 3x ^2 - 4 = 8

+4

Answers (2)

Know the Answer?

Jerry · Answer 1

x = ±2

Step-by-step explanation:

3x ^2 - 4 = 8

Add 4 to each side

3x ^2 - 4+4 = 8+4

3x^2 = 12

Divide each side by 3

3x^2 = 12

3x^2/3 = 12/3

x^2 = 4

Take the square root of each side

sqrt (x^2) = ±sqrt (4)

x = ±2

Diya Petty · Answer 2

x = 2

Step-by-step explanation:

3x ^2 - 4 = 8

+4

3x^2 = 12

3x^2/3 = 12/3

x^2 = 4

Square root 4 is 2

x = 2