n*n-50=90-40

Solution for n*n-50=90-40 equation:

Simplifying
n * n + -50 = 90 + -40

Multiply n * n
n2 + -50 = 90 + -40

Reorder the terms:
-50 + n2 = 90 + -40

Combine like terms: 90 + -40 = 50
-50 + n2 = 50

Solving
-50 + n2 = 50

Solving for variable 'n'.

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

Add '50' to each side of the equation.
-50 + 50 + n2 = 50 + 50

Combine like terms: -50 + 50 = 0
0 + n2 = 50 + 50
n2 = 50 + 50

Combine like terms: 50 + 50 = 100
n2 = 100

Simplifying
n2 = 100

Take the square root of each side:
n = {-10, 10}