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

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


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

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

Remove parenthesis around (-3x + x2)
-3x + x2 + -9 = (x + -3)(x + 3)

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

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

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

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

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

Add '9' to each side of the equation.
-9 + -3x + 9 + x2 = -9 + 9 + x2

Reorder the terms:
-9 + 9 + -3x + x2 = -9 + 9 + x2

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

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

Add '-1x2' to each side of the equation.
-3x + x2 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-3x + 0 = x2 + -1x2
-3x = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-3x = 0

Solving
-3x = 0

Solving for variable 'x'.

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

Divide each side by '-3'.
x = 0

Simplifying
x = 0

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