x^2+2X-9=-16

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Solution for x^2+2X-9=-16 equation: 


Simplifying
x2 + 2X + -9 = -16

Reorder the terms:
-9 + 2X + x2 = -16

Solving
-9 + 2X + x2 = -16

Solving for variable 'X'.

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

Add '9' to each side of the equation.
-9 + 2X + 9 + x2 = -16 + 9

Reorder the terms:
-9 + 9 + 2X + x2 = -16 + 9

Combine like terms: -9 + 9 = 0
0 + 2X + x2 = -16 + 9
2X + x2 = -16 + 9

Combine like terms: -16 + 9 = -7
2X + x2 = -7

Add '-1x2' to each side of the equation.
2X + x2 + -1x2 = -7 + -1x2

Combine like terms: x2 + -1x2 = 0
2X + 0 = -7 + -1x2
2X = -7 + -1x2

Divide each side by '2'.
X = -3.5 + -0.5x2

Simplifying
X = -3.5 + -0.5x2

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