x(x)+1=420

Solution for x(x)+1=420 equation:

Simplifying
x(x) + 1 = 420

Multiply x * x
x2 + 1 = 420

Reorder the terms:
1 + x2 = 420

Solving
1 + x2 = 420

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + x2 = 420 + -1

Combine like terms: 1 + -1 = 0
0 + x2 = 420 + -1
x2 = 420 + -1

Combine like terms: 420 + -1 = 419
x2 = 419

Simplifying
x2 = 419

Take the square root of each side:
x = {-20.46948949, 20.46948949}