2x^2-5-7=3

Solution for 2x^2-5-7=3 equation:

Simplifying
2x2 + -5 + -7 = 3

Reorder the terms:
-5 + -7 + 2x2 = 3

Combine like terms: -5 + -7 = -12
-12 + 2x2 = 3

Solving
-12 + 2x2 = 3

Solving for variable 'x'.

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

Add '12' to each side of the equation.
-12 + 12 + 2x2 = 3 + 12

Combine like terms: -12 + 12 = 0
0 + 2x2 = 3 + 12
2x2 = 3 + 12

Combine like terms: 3 + 12 = 15
2x2 = 15

Divide each side by '2'.
x2 = 7.5

Simplifying
x2 = 7.5

Take the square root of each side:
x = {-2.738612788, 2.738612788}