7x^2-5x^2-1=0

Solution for 7x^2-5x^2-1=0 equation:

Simplifying
7x2 + -5x2 + -1 = 0

Reorder the terms:
-1 + 7x2 + -5x2 = 0

Combine like terms: 7x2 + -5x2 = 2x2
-1 + 2x2 = 0

Solving
-1 + 2x2 = 0

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 2x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2x2 = 0 + 1
2x2 = 0 + 1

Combine like terms: 0 + 1 = 1
2x2 = 1

Divide each side by '2'.
x2 = 0.5

Simplifying
x2 = 0.5

Take the square root of each side:
x = {-0.707106781, 0.707106781}