3n^2+15=90

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Solution for 3n^2+15=90 equation: 


Simplifying
3n2 + 15 = 90

Reorder the terms:
15 + 3n2 = 90

Solving
15 + 3n2 = 90

Solving for variable 'n'.

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

Add '-15' to each side of the equation.
15 + -15 + 3n2 = 90 + -15

Combine like terms: 15 + -15 = 0
0 + 3n2 = 90 + -15
3n2 = 90 + -15

Combine like terms: 90 + -15 = 75
3n2 = 75

Divide each side by '3'.
n2 = 25

Simplifying
n2 = 25

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

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