x^2*4+2=20
Solve for x: 4 x^2 + 2 = 20
Subtract 2 from both sides: 4 x^2 = 18
Divide both sides by 4: x^2 = 9/2
Take the square root of both sides: Answer: |x = 3/sqrt(2) or x = -3/sqrt(2)
