X^2-20x=-21

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Solution for X^2-20x=-21 equation: 


Simplifying
X2 + -20x = -21

Solving
X2 + -20x = -21

Solving for variable 'X'.

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

Add '20x' to each side of the equation.
X2 + -20x + 20x = -21 + 20x

Combine like terms: -20x + 20x = 0
X2 + 0 = -21 + 20x
X2 = -21 + 20x

Simplifying
X2 = -21 + 20x

Reorder the terms:
21 + X2 + -20x = -21 + 20x + 21 + -20x

Reorder the terms:
21 + X2 + -20x = -21 + 21 + 20x + -20x

Combine like terms: -21 + 21 = 0
21 + X2 + -20x = 0 + 20x + -20x
21 + X2 + -20x = 20x + -20x

Combine like terms: 20x + -20x = 0
21 + X2 + -20x = 0

The solution to this equation could not be determined.

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