x*x+19-90=0

Solution for x*x+19-90=0 equation:

Simplifying
x * x + 19 + -90 = 0

Multiply x * x
x2 + 19 + -90 = 0

Reorder the terms:
19 + -90 + x2 = 0

Combine like terms: 19 + -90 = -71
-71 + x2 = 0

Solving
-71 + x2 = 0

Solving for variable 'x'.

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

Add '71' to each side of the equation.
-71 + 71 + x2 = 0 + 71

Combine like terms: -71 + 71 = 0
0 + x2 = 0 + 71
x2 = 0 + 71

Combine like terms: 0 + 71 = 71
x2 = 71

Simplifying
x2 = 71

Take the square root of each side:
x = {-8.426149773, 8.426149773}