(5x+3)(2x+5)=0

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Solution for (5x+3)(2x+5)=0 equation: 


Simplifying
(5x + 3)(2x + 5) = 0

Reorder the terms:
(3 + 5x)(2x + 5) = 0

Reorder the terms:
(3 + 5x)(5 + 2x) = 0

Multiply (3 + 5x) * (5 + 2x)
(3(5 + 2x) + 5x * (5 + 2x)) = 0
((5 * 3 + 2x * 3) + 5x * (5 + 2x)) = 0
((15 + 6x) + 5x * (5 + 2x)) = 0
(15 + 6x + (5 * 5x + 2x * 5x)) = 0
(15 + 6x + (25x + 10x2)) = 0

Combine like terms: 6x + 25x = 31x
(15 + 31x + 10x2) = 0

Solving
15 + 31x + 10x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(5 + 2x)(3 + 5x) = 0


Subproblem 1
Set the factor '(5 + 2x)' equal to zero and attempt to solve:

Simplifying
5 + 2x = 0

Solving
5 + 2x = 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 + 2x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 2x = 0 + -5
2x = 0 + -5

Combine like terms: 0 + -5 = -5
2x = -5

Divide each side by '2'.
x = -2.5

Simplifying
x = -2.5

Subproblem 2
Set the factor '(3 + 5x)' equal to zero and attempt to solve:

Simplifying
3 + 5x = 0

Solving
3 + 5x = 0

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

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

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

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

Divide each side by '5'.
x = -0.6

Simplifying
x = -0.6
Solution
x = {-2.5, -0.6}

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