x(x-2)-2(x+2)=x^2+4

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Solution for x(x-2)-2(x+2)=x^2+4 equation:


Simplifying
x(x + -2) + -2(x + 2) = x2 + 4

Reorder the terms:
x(-2 + x) + -2(x + 2) = x2 + 4
(-2 * x + x * x) + -2(x + 2) = x2 + 4
(-2x + x2) + -2(x + 2) = x2 + 4

Reorder the terms:
-2x + x2 + -2(2 + x) = x2 + 4
-2x + x2 + (2 * -2 + x * -2) = x2 + 4
-2x + x2 + (-4 + -2x) = x2 + 4

Reorder the terms:
-4 + -2x + -2x + x2 = x2 + 4

Combine like terms: -2x + -2x = -4x
-4 + -4x + x2 = x2 + 4

Reorder the terms:
-4 + -4x + x2 = 4 + x2

Add '-1x2' to each side of the equation.
-4 + -4x + x2 + -1x2 = 4 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4 + -4x + 0 = 4 + x2 + -1x2
-4 + -4x = 4 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4 + -4x = 4 + 0
-4 + -4x = 4

Solving
-4 + -4x = 4

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + -4x = 4 + 4

Combine like terms: -4 + 4 = 0
0 + -4x = 4 + 4
-4x = 4 + 4

Combine like terms: 4 + 4 = 8
-4x = 8

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

Simplifying
x = -2

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