(3x+5)(5x+4)=

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Solution for (3x+5)(5x+4)= equation: 


Simplifying
(3x + 5)(5x + 4) = 0

Reorder the terms:
(5 + 3x)(5x + 4) = 0

Reorder the terms:
(5 + 3x)(4 + 5x) = 0

Multiply (5 + 3x) * (4 + 5x)
(5(4 + 5x) + 3x * (4 + 5x)) = 0
((4 * 5 + 5x * 5) + 3x * (4 + 5x)) = 0
((20 + 25x) + 3x * (4 + 5x)) = 0
(20 + 25x + (4 * 3x + 5x * 3x)) = 0
(20 + 25x + (12x + 15x2)) = 0

Combine like terms: 25x + 12x = 37x
(20 + 37x + 15x2) = 0

Solving
20 + 37x + 15x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(5 + 3x)(4 + 5x) = 0


Subproblem 1
Set the factor '(5 + 3x)' equal to zero and attempt to solve:

Simplifying
5 + 3x = 0

Solving
5 + 3x = 0

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

Add '-5' to each side of the equation.
5 + -5 + 3x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 3x = 0 + -5
3x = 0 + -5

Combine like terms: 0 + -5 = -5
3x = -5

Divide each side by '3'.
x = -1.666666667

Simplifying
x = -1.666666667

Subproblem 2
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
Solution
x = {-1.666666667, -0.8}

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