x(x+2)=(x-1)(x+4)

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Solution for x(x+2)=(x-1)(x+4) equation:


Simplifying
x(x + 2) = (x + -1)(x + 4)

Reorder the terms:
x(2 + x) = (x + -1)(x + 4)
(2 * x + x * x) = (x + -1)(x + 4)
(2x + x2) = (x + -1)(x + 4)

Reorder the terms:
2x + x2 = (-1 + x)(x + 4)

Reorder the terms:
2x + x2 = (-1 + x)(4 + x)

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

Combine like terms: -1x + 4x = 3x
2x + x2 = (-4 + 3x + x2)

Add '-1x2' to each side of the equation.
2x + x2 + -1x2 = -4 + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
2x + 0 = -4 + 3x + x2 + -1x2
2x = -4 + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
2x = -4 + 3x + 0
2x = -4 + 3x

Solving
2x = -4 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
2x + -3x = -4 + 3x + -3x

Combine like terms: 2x + -3x = -1x
-1x = -4 + 3x + -3x

Combine like terms: 3x + -3x = 0
-1x = -4 + 0
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4

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