(x-3)(x+3)=x^2-6x+9

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Solution for (x-3)(x+3)=x^2-6x+9 equation:


Simplifying
(x + -3)(x + 3) = x2 + -6x + 9

Reorder the terms:
(-3 + x)(x + 3) = x2 + -6x + 9

Reorder the terms:
(-3 + x)(3 + x) = x2 + -6x + 9

Multiply (-3 + x) * (3 + x)
(-3(3 + x) + x(3 + x)) = x2 + -6x + 9
((3 * -3 + x * -3) + x(3 + x)) = x2 + -6x + 9
((-9 + -3x) + x(3 + x)) = x2 + -6x + 9
(-9 + -3x + (3 * x + x * x)) = x2 + -6x + 9
(-9 + -3x + (3x + x2)) = x2 + -6x + 9

Combine like terms: -3x + 3x = 0
(-9 + 0 + x2) = x2 + -6x + 9
(-9 + x2) = x2 + -6x + 9

Reorder the terms:
-9 + x2 = 9 + -6x + x2

Add '-1x2' to each side of the equation.
-9 + x2 + -1x2 = 9 + -6x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-9 + 0 = 9 + -6x + x2 + -1x2
-9 = 9 + -6x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-9 = 9 + -6x + 0
-9 = 9 + -6x

Solving
-9 = 9 + -6x

Solving for variable 'x'.

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

Add '6x' to each side of the equation.
-9 + 6x = 9 + -6x + 6x

Combine like terms: -6x + 6x = 0
-9 + 6x = 9 + 0
-9 + 6x = 9

Add '9' to each side of the equation.
-9 + 9 + 6x = 9 + 9

Combine like terms: -9 + 9 = 0
0 + 6x = 9 + 9
6x = 9 + 9

Combine like terms: 9 + 9 = 18
6x = 18

Divide each side by '6'.
x = 3

Simplifying
x = 3

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