(3x+7)(4x-8)=0

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Solution for (3x+7)(4x-8)=0 equation: 


Simplifying
(3x + 7)(4x + -8) = 0

Reorder the terms:
(7 + 3x)(4x + -8) = 0

Reorder the terms:
(7 + 3x)(-8 + 4x) = 0

Multiply (7 + 3x) * (-8 + 4x)
(7(-8 + 4x) + 3x * (-8 + 4x)) = 0
((-8 * 7 + 4x * 7) + 3x * (-8 + 4x)) = 0
((-56 + 28x) + 3x * (-8 + 4x)) = 0
(-56 + 28x + (-8 * 3x + 4x * 3x)) = 0
(-56 + 28x + (-24x + 12x2)) = 0

Combine like terms: 28x + -24x = 4x
(-56 + 4x + 12x2) = 0

Solving
-56 + 4x + 12x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-14 + x + 3x2) = 0

Factor a trinomial.
4((-7 + -3x)(2 + -1x)) = 0

Ignore the factor 4.

Subproblem 1
Set the factor '(-7 + -3x)' equal to zero and attempt to solve:

Simplifying
-7 + -3x = 0

Solving
-7 + -3x = 0

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

Add '7' to each side of the equation.
-7 + 7 + -3x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -3x = 0 + 7
-3x = 0 + 7

Combine like terms: 0 + 7 = 7
-3x = 7

Divide each side by '-3'.
x = -2.333333333

Simplifying
x = -2.333333333

Subproblem 2
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
Solution
x = {-2.333333333, 2}

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