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

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


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

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

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

Multiply (-2 + x) * (2 + x)
(-2(2 + x) + x(2 + x)) = x(x + 1) + 7
((2 * -2 + x * -2) + x(2 + x)) = x(x + 1) + 7
((-4 + -2x) + x(2 + x)) = x(x + 1) + 7
(-4 + -2x + (2 * x + x * x)) = x(x + 1) + 7
(-4 + -2x + (2x + x2)) = x(x + 1) + 7

Combine like terms: -2x + 2x = 0
(-4 + 0 + x2) = x(x + 1) + 7
(-4 + x2) = x(x + 1) + 7

Reorder the terms:
-4 + x2 = x(1 + x) + 7
-4 + x2 = (1 * x + x * x) + 7
-4 + x2 = (1x + x2) + 7

Reorder the terms:
-4 + x2 = 7 + 1x + x2

Add '-1x2' to each side of the equation.
-4 + x2 + -1x2 = 7 + 1x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4 + 0 = 7 + 1x + x2 + -1x2
-4 = 7 + 1x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4 = 7 + 1x + 0
-4 = 7 + 1x

Solving
-4 = 7 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-4 + -1x = 7 + 1x + -1x

Combine like terms: 1x + -1x = 0
-4 + -1x = 7 + 0
-4 + -1x = 7

Add '4' to each side of the equation.
-4 + 4 + -1x = 7 + 4

Combine like terms: -4 + 4 = 0
0 + -1x = 7 + 4
-1x = 7 + 4

Combine like terms: 7 + 4 = 11
-1x = 11

Divide each side by '-1'.
x = -11

Simplifying
x = -11

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