21x^2-525=0

Solution for 21x^2-525=0 equation:

Simplifying
21x2 + -525 = 0

Reorder the terms:
-525 + 21x2 = 0

Solving
-525 + 21x2 = 0

Solving for variable 'x'.

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

Add '525' to each side of the equation.
-525 + 525 + 21x2 = 0 + 525

Combine like terms: -525 + 525 = 0
0 + 21x2 = 0 + 525
21x2 = 0 + 525

Combine like terms: 0 + 525 = 525
21x2 = 525

Divide each side by '21'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}