x(2x+3)+4=2(x+1)(x-1)

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Solution for x(2x+3)+4=2(x+1)(x-1) equation:


Simplifying
x(2x + 3) + 4 = 2(x + 1)(x + -1)

Reorder the terms:
x(3 + 2x) + 4 = 2(x + 1)(x + -1)
(3 * x + 2x * x) + 4 = 2(x + 1)(x + -1)
(3x + 2x2) + 4 = 2(x + 1)(x + -1)

Reorder the terms:
4 + 3x + 2x2 = 2(x + 1)(x + -1)

Reorder the terms:
4 + 3x + 2x2 = 2(1 + x)(x + -1)

Reorder the terms:
4 + 3x + 2x2 = 2(1 + x)(-1 + x)

Multiply (1 + x) * (-1 + x)
4 + 3x + 2x2 = 2(1(-1 + x) + x(-1 + x))
4 + 3x + 2x2 = 2((-1 * 1 + x * 1) + x(-1 + x))
4 + 3x + 2x2 = 2((-1 + 1x) + x(-1 + x))
4 + 3x + 2x2 = 2(-1 + 1x + (-1 * x + x * x))
4 + 3x + 2x2 = 2(-1 + 1x + (-1x + x2))

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

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

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

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

Solving
4 + 3x = -2

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 + 3x = -2 + -4

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

Combine like terms: -2 + -4 = -6
3x = -6

Divide each side by '3'.
x = -2

Simplifying
x = -2

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