x(x+2)-13=(x-3)(x+3)

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Solution for x(x+2)-13=(x-3)(x+3) equation:


Simplifying
x(x + 2) + -13 = (x + -3)(x + 3)

Reorder the terms:
x(2 + x) + -13 = (x + -3)(x + 3)
(2 * x + x * x) + -13 = (x + -3)(x + 3)
(2x + x2) + -13 = (x + -3)(x + 3)

Reorder the terms:
-13 + 2x + x2 = (x + -3)(x + 3)

Reorder the terms:
-13 + 2x + x2 = (-3 + x)(x + 3)

Reorder the terms:
-13 + 2x + x2 = (-3 + x)(3 + x)

Multiply (-3 + x) * (3 + x)
-13 + 2x + x2 = (-3(3 + x) + x(3 + x))
-13 + 2x + x2 = ((3 * -3 + x * -3) + x(3 + x))
-13 + 2x + x2 = ((-9 + -3x) + x(3 + x))
-13 + 2x + x2 = (-9 + -3x + (3 * x + x * x))
-13 + 2x + x2 = (-9 + -3x + (3x + x2))

Combine like terms: -3x + 3x = 0
-13 + 2x + x2 = (-9 + 0 + x2)
-13 + 2x + x2 = (-9 + x2)

Add '-1x2' to each side of the equation.
-13 + 2x + x2 + -1x2 = -9 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-13 + 2x + 0 = -9 + x2 + -1x2
-13 + 2x = -9 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-13 + 2x = -9 + 0
-13 + 2x = -9

Solving
-13 + 2x = -9

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + 2x = -9 + 13

Combine like terms: -13 + 13 = 0
0 + 2x = -9 + 13
2x = -9 + 13

Combine like terms: -9 + 13 = 4
2x = 4

Divide each side by '2'.
x = 2

Simplifying
x = 2

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