9+x^2=x^2+2x+1

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Solution for 9+x^2=x^2+2x+1 equation:


Simplifying
9 + x2 = x2 + 2x + 1

Reorder the terms:
9 + x2 = 1 + 2x + x2

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

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

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

Solving
9 = 1 + 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.
9 + -2x = 1 + 2x + -2x

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

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

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

Combine like terms: 1 + -9 = -8
-2x = -8

Divide each side by '-2'.
x = 4

Simplifying
x = 4

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