(5x+4)(7x-2)=

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Solution for (5x+4)(7x-2)= equation: 


Simplifying
(5x + 4)(7x + -2) = 0

Reorder the terms:
(4 + 5x)(7x + -2) = 0

Reorder the terms:
(4 + 5x)(-2 + 7x) = 0

Multiply (4 + 5x) * (-2 + 7x)
(4(-2 + 7x) + 5x * (-2 + 7x)) = 0
((-2 * 4 + 7x * 4) + 5x * (-2 + 7x)) = 0
((-8 + 28x) + 5x * (-2 + 7x)) = 0
(-8 + 28x + (-2 * 5x + 7x * 5x)) = 0
(-8 + 28x + (-10x + 35x2)) = 0

Combine like terms: 28x + -10x = 18x
(-8 + 18x + 35x2) = 0

Solving
-8 + 18x + 35x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + -5x)(2 + -7x) = 0


Subproblem 1
Set the factor '(-4 + -5x)' equal to zero and attempt to solve:

Simplifying
-4 + -5x = 0

Solving
-4 + -5x = 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 + -5x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -5x = 0 + 4
-5x = 0 + 4

Combine like terms: 0 + 4 = 4
-5x = 4

Divide each side by '-5'.
x = -0.8

Simplifying
x = -0.8

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

Simplifying
2 + -7x = 0

Solving
2 + -7x = 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 + -7x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -7x = 0 + -2
-7x = 0 + -2

Combine like terms: 0 + -2 = -2
-7x = -2

Divide each side by '-7'.
x = 0.2857142857

Simplifying
x = 0.2857142857
Solution
x = {-0.8, 0.2857142857}

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