How can i solve 3x^2 = 48 ?

1 Answer
Feb 27, 2018

x = +-4

Explanation:

3x^2 = 48   Solve for x

1) Divide both sides by 3 to isolate x^2

x^2 = 16

2) Find the square roots of both sides

sqrt(x^2) = sqrt(16)

x = +-4 larr answer

"Answer
x = +-4

Check

Do the problem in reverse to see if you bring back the original equation

x = + 4
x^2 = 16
3x^2= 48   ✓

x = - 4
x^2 = 16
3x^2 = 48   ✓

Check