2x^2-20=70

Solution for 2x^2-20=70 equation:

Simplifying
2x2 + -20 = 70

Reorder the terms:
-20 + 2x2 = 70

Solving
-20 + 2x2 = 70

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '20' to each side of the equation.
-20 + 20 + 2x2 = 70 + 20

Combine like terms: -20 + 20 = 0
0 + 2x2 = 70 + 20
2x2 = 70 + 20

Combine like terms: 70 + 20 = 90
2x2 = 90

Divide each side by '2'.
x2 = 45

Simplifying
x2 = 45

Take the square root of each side:
x = {-6.708203933, 6.708203933}