9x^2-21=175

Solution for 9x^2-21=175 equation:

Simplifying
9x2 + -21 = 175

Reorder the terms:
-21 + 9x2 = 175

Solving
-21 + 9x2 = 175

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 9x2 = 175 + 21

Combine like terms: -21 + 21 = 0
0 + 9x2 = 175 + 21
9x2 = 175 + 21

Combine like terms: 175 + 21 = 196
9x2 = 196

Divide each side by '9'.
x2 = 21.77777778

Simplifying
x2 = 21.77777778

Take the square root of each side:
x = {-4.666666667, 4.666666667}