7n^2-9=-2

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Solution for 7n^2-9=-2 equation: 


Simplifying
7n2 + -9 = -2

Reorder the terms:
-9 + 7n2 = -2

Solving
-9 + 7n2 = -2

Solving for variable 'n'.

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

Add '9' to each side of the equation.
-9 + 9 + 7n2 = -2 + 9

Combine like terms: -9 + 9 = 0
0 + 7n2 = -2 + 9
7n2 = -2 + 9

Combine like terms: -2 + 9 = 7
7n2 = 7

Divide each side by '7'.
n2 = 1

Simplifying
n2 = 1

Take the square root of each side:
n = {-1, 1}

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