(5x+7)(4x-7)=

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Solution for (5x+7)(4x-7)= equation: 


Simplifying
(5x + 7)(4x + -7) = 0

Reorder the terms:
(7 + 5x)(4x + -7) = 0

Reorder the terms:
(7 + 5x)(-7 + 4x) = 0

Multiply (7 + 5x) * (-7 + 4x)
(7(-7 + 4x) + 5x * (-7 + 4x)) = 0
((-7 * 7 + 4x * 7) + 5x * (-7 + 4x)) = 0
((-49 + 28x) + 5x * (-7 + 4x)) = 0
(-49 + 28x + (-7 * 5x + 4x * 5x)) = 0
(-49 + 28x + (-35x + 20x2)) = 0

Combine like terms: 28x + -35x = -7x
(-49 + -7x + 20x2) = 0

Solving
-49 + -7x + 20x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -5x)(7 + -4x) = 0


Subproblem 1
Set the factor '(-7 + -5x)' equal to zero and attempt to solve:

Simplifying
-7 + -5x = 0

Solving
-7 + -5x = 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 + -5x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -5x = 0 + 7
-5x = 0 + 7

Combine like terms: 0 + 7 = 7
-5x = 7

Divide each side by '-5'.
x = -1.4

Simplifying
x = -1.4

Subproblem 2
Set the factor '(7 + -4x)' equal to zero and attempt to solve:

Simplifying
7 + -4x = 0

Solving
7 + -4x = 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 + -4x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -4x = 0 + -7
-4x = 0 + -7

Combine like terms: 0 + -7 = -7
-4x = -7

Divide each side by '-4'.
x = 1.75

Simplifying
x = 1.75
Solution
x = {-1.4, 1.75}

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