Answer:
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 /3 = 12/3
x^2 = 4
Take the square root of each side
sqrt(x^2) = ±sqrt(4)
x = 4 or -4
Step-by-Step Explanation:
3x² - 4 = 8
Add 4 to both sides.
3x² - 4 + 4 = 8 + 4
3x² = 12
Divide 3 to both sides.
3x²/3 = 12/3
x² = 4
Take square root of both sides.
±√x² = ±√4
