(7x-4)(4x+8)=0

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Solution for (7x-4)(4x+8)=0 equation:


Simplifying
(7x + -4)(4x + 8) = 0

Reorder the terms:
(-4 + 7x)(4x + 8) = 0

Reorder the terms:
(-4 + 7x)(8 + 4x) = 0

Multiply (-4 + 7x) * (8 + 4x)
(-4(8 + 4x) + 7x * (8 + 4x)) = 0
((8 * -4 + 4x * -4) + 7x * (8 + 4x)) = 0
((-32 + -16x) + 7x * (8 + 4x)) = 0
(-32 + -16x + (8 * 7x + 4x * 7x)) = 0
(-32 + -16x + (56x + 28x2)) = 0

Combine like terms: -16x + 56x = 40x
(-32 + 40x + 28x2) = 0

Solving
-32 + 40x + 28x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-8 + 10x + 7x2) = 0

Factor a trinomial.
4((-2 + -1x)(4 + -7x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

Subproblem 2

Set the factor '(4 + -7x)' equal to zero and attempt to solve: Simplifying 4 + -7x = 0 Solving 4 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -7x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -7x = 0 + -4 -7x = 0 + -4 Combine like terms: 0 + -4 = -4 -7x = -4 Divide each side by '-7'. x = 0.5714285714 Simplifying x = 0.5714285714

Solution

x = {-2, 0.5714285714}

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