x(x-1)-x(x+2)=7

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Solution for x(x-1)-x(x+2)=7 equation:


Simplifying
x(x + -1) + -1x(x + 2) = 7

Reorder the terms:
x(-1 + x) + -1x(x + 2) = 7
(-1 * x + x * x) + -1x(x + 2) = 7
(-1x + x2) + -1x(x + 2) = 7

Reorder the terms:
-1x + x2 + -1x(2 + x) = 7
-1x + x2 + (2 * -1x + x * -1x) = 7
-1x + x2 + (-2x + -1x2) = 7

Reorder the terms:
-1x + -2x + x2 + -1x2 = 7

Combine like terms: -1x + -2x = -3x
-3x + x2 + -1x2 = 7

Combine like terms: x2 + -1x2 = 0
-3x + 0 = 7
-3x = 7

Solving
-3x = 7

Solving for variable 'x'.

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

Divide each side by '-3'.
x = -2.333333333

Simplifying
x = -2.333333333

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