x^2=x^2+2x-9

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


Simplifying
x2 = x2 + 2x + -9

Reorder the terms:
x2 = -9 + 2x + x2

Add '-1x2' to each side of the equation.
x2 + -1x2 = -9 + 2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0 = -9 + 2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0 = -9 + 2x + 0
0 = -9 + 2x

Solving
0 = -9 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
0 + -2x = -9 + 2x + -2x
Remove the zero:
-2x = -9 + 2x + -2x

Combine like terms: 2x + -2x = 0
-2x = -9 + 0
-2x = -9

Divide each side by '-2'.
x = 4.5

Simplifying
x = 4.5

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