Answer:
x=±3 sqrt(2)
Explanation:
3x^2 - 6 = 48
Add 6 to each side
3x^2 - 6+6 = 48+6
3x^2 = 54
Divide each side by 3
3x^2/3 =54/3
x^2 = 18
Take the square root of each side
sqrt(x^2) =sqrt(18)
x =sqrt(18)
We know sqrt(ab) = sqrt(a) sqrt(b)
x =sqrt(9)sqrt(2)
x=±3 sqrt(2)