Question 1027558
To solve this,
4x^2 - 7 = 65
add 7 to both sides
4x^2 = 72
divide by 4
x^2 = 18
take the square root and get
{{{x = plus or minus sqrt(18)}}}
Then we can simplify the root to get
{{{x = plus or minus 3*sqrt(2)}}}