2x^2-3=87

Solution for 2x^2-3=87 equation:

Simplifying
2x2 + -3 = 87

Reorder the terms:
-3 + 2x2 = 87

Solving
-3 + 2x2 = 87

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 2x2 = 87 + 3

Combine like terms: -3 + 3 = 0
0 + 2x2 = 87 + 3
2x2 = 87 + 3

Combine like terms: 87 + 3 = 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}