4x(2x+5)=8(x+1)(x-1)

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Solution for 4x(2x+5)=8(x+1)(x-1) equation:


Simplifying
4x(2x + 5) = 8(x + 1)(x + -1)

Reorder the terms:
4x(5 + 2x) = 8(x + 1)(x + -1)
(5 * 4x + 2x * 4x) = 8(x + 1)(x + -1)
(20x + 8x2) = 8(x + 1)(x + -1)

Reorder the terms:
20x + 8x2 = 8(1 + x)(x + -1)

Reorder the terms:
20x + 8x2 = 8(1 + x)(-1 + x)

Multiply (1 + x) * (-1 + x)
20x + 8x2 = 8(1(-1 + x) + x(-1 + x))
20x + 8x2 = 8((-1 * 1 + x * 1) + x(-1 + x))
20x + 8x2 = 8((-1 + 1x) + x(-1 + x))
20x + 8x2 = 8(-1 + 1x + (-1 * x + x * x))
20x + 8x2 = 8(-1 + 1x + (-1x + x2))

Combine like terms: 1x + -1x = 0
20x + 8x2 = 8(-1 + 0 + x2)
20x + 8x2 = 8(-1 + x2)
20x + 8x2 = (-1 * 8 + x2 * 8)
20x + 8x2 = (-8 + 8x2)

Add '-8x2' to each side of the equation.
20x + 8x2 + -8x2 = -8 + 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
20x + 0 = -8 + 8x2 + -8x2
20x = -8 + 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
20x = -8 + 0
20x = -8

Solving
20x = -8

Solving for variable 'x'.

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

Divide each side by '20'.
x = -0.4

Simplifying
x = -0.4

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