X^2+10x-21=9

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Solution for X^2+10x-21=9 equation: 


Simplifying
X2 + 10x + -21 = 9

Reorder the terms:
-21 + X2 + 10x = 9

Solving
-21 + X2 + 10x = 9

Solving for variable 'X'.

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

Add '21' to each side of the equation.
-21 + X2 + 21 + 10x = 9 + 21

Reorder the terms:
-21 + 21 + X2 + 10x = 9 + 21

Combine like terms: -21 + 21 = 0
0 + X2 + 10x = 9 + 21
X2 + 10x = 9 + 21

Combine like terms: 9 + 21 = 30
X2 + 10x = 30

Add '-10x' to each side of the equation.
X2 + 10x + -10x = 30 + -10x

Combine like terms: 10x + -10x = 0
X2 + 0 = 30 + -10x
X2 = 30 + -10x

Simplifying
X2 = 30 + -10x

Reorder the terms:
-30 + X2 + 10x = 30 + -10x + -30 + 10x

Reorder the terms:
-30 + X2 + 10x = 30 + -30 + -10x + 10x

Combine like terms: 30 + -30 = 0
-30 + X2 + 10x = 0 + -10x + 10x
-30 + X2 + 10x = -10x + 10x

Combine like terms: -10x + 10x = 0
-30 + X2 + 10x = 0

The solution to this equation could not be determined.

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