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

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Solution for (4x+5)(3x+4)=0 equation: 


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

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

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

Multiply (5 + 4x) * (4 + 3x)
(5(4 + 3x) + 4x * (4 + 3x)) = 0
((4 * 5 + 3x * 5) + 4x * (4 + 3x)) = 0
((20 + 15x) + 4x * (4 + 3x)) = 0
(20 + 15x + (4 * 4x + 3x * 4x)) = 0
(20 + 15x + (16x + 12x2)) = 0

Combine like terms: 15x + 16x = 31x
(20 + 31x + 12x2) = 0

Solving
20 + 31x + 12x2 = 0

Solving for variable 'x'.

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


Subproblem 1
Set the factor '(4 + 3x)' equal to zero and attempt to solve:

Simplifying
4 + 3x = 0

Solving
4 + 3x = 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 + 3x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 3x = 0 + -4
3x = 0 + -4

Combine like terms: 0 + -4 = -4
3x = -4

Divide each side by '3'.
x = -1.333333333

Simplifying
x = -1.333333333

Subproblem 2
Set the factor '(5 + 4x)' equal to zero and attempt to solve:

Simplifying
5 + 4x = 0

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

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

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

Divide each side by '4'.
x = -1.25

Simplifying
x = -1.25
Solution
x = {-1.333333333, -1.25}

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