9x^2-1=440

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Solution for 9x^2-1=440 equation:


Simplifying
9x2 + -1 = 440

Reorder the terms:
-1 + 9x2 = 440

Solving
-1 + 9x2 = 440

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 + 9x2 = 440 + 1

Combine like terms: -1 + 1 = 0
0 + 9x2 = 440 + 1
9x2 = 440 + 1

Combine like terms: 440 + 1 = 441
9x2 = 441

Divide each side by '9'.
x2 = 49

Simplifying
x2 = 49

Take the square root of each side:
x = {-7, 7}

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