X^2+7x+21=9

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Solution for X^2+7x+21=9 equation:


Simplifying
X2 + 7x + 21 = 9

Reorder the terms:
21 + X2 + 7x = 9

Solving
21 + X2 + 7x = 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 + 7x = 9 + -21

Reorder the terms:
21 + -21 + X2 + 7x = 9 + -21

Combine like terms: 21 + -21 = 0
0 + X2 + 7x = 9 + -21
X2 + 7x = 9 + -21

Combine like terms: 9 + -21 = -12
X2 + 7x = -12

Add '-7x' to each side of the equation.
X2 + 7x + -7x = -12 + -7x

Combine like terms: 7x + -7x = 0
X2 + 0 = -12 + -7x
X2 = -12 + -7x

Simplifying
X2 = -12 + -7x

Reorder the terms:
12 + X2 + 7x = -12 + -7x + 12 + 7x

Reorder the terms:
12 + X2 + 7x = -12 + 12 + -7x + 7x

Combine like terms: -12 + 12 = 0
12 + X2 + 7x = 0 + -7x + 7x
12 + X2 + 7x = -7x + 7x

Combine like terms: -7x + 7x = 0
12 + X2 + 7x = 0

The solution to this equation could not be determined.

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