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Simplifying
3n2 + -0.75 = 90
Reorder the terms:
-0.75 + 3n2 = 90
Solving
-0.75 + 3n2 = 90
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '0.75' to each side of the equation.
-0.75 + 0.75 + 3n2 = 90 + 0.75
Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 3n2 = 90 + 0.75
3n2 = 90 + 0.75
Combine like terms: 90 + 0.75 = 90.75
3n2 = 90.75
Divide each side by '3'.
n2 = 30.25
Simplifying
n2 = 30.25
Take the square root of each side:
n = {-5.5, 5.5}
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