y^2-13-90=0

Solution for y^2-13-90=0 equation:

Simplifying
y2 + -13 + -90 = 0

Reorder the terms:
-13 + -90 + y2 = 0

Combine like terms: -13 + -90 = -103
-103 + y2 = 0

Solving
-103 + y2 = 0

Solving for variable 'y'.

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

Add '103' to each side of the equation.
-103 + 103 + y2 = 0 + 103

Combine like terms: -103 + 103 = 0
0 + y2 = 0 + 103
y2 = 0 + 103

Combine like terms: 0 + 103 = 103
y2 = 103

Simplifying
y2 = 103

Take the square root of each side:
y = {-10.148891565, 10.148891565}