(2x-3)(5x+20)=0

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Solution for (2x-3)(5x+20)=0 equation: 


Simplifying
(2x + -3)(5x + 20) = 0

Reorder the terms:
(-3 + 2x)(5x + 20) = 0

Reorder the terms:
(-3 + 2x)(20 + 5x) = 0

Multiply (-3 + 2x) * (20 + 5x)
(-3(20 + 5x) + 2x * (20 + 5x)) = 0
((20 * -3 + 5x * -3) + 2x * (20 + 5x)) = 0
((-60 + -15x) + 2x * (20 + 5x)) = 0
(-60 + -15x + (20 * 2x + 5x * 2x)) = 0
(-60 + -15x + (40x + 10x2)) = 0

Combine like terms: -15x + 40x = 25x
(-60 + 25x + 10x2) = 0

Solving
-60 + 25x + 10x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-12 + 5x + 2x2) = 0

Factor a trinomial.
5((-4 + -1x)(3 + -2x)) = 0

Ignore the factor 5.

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

Simplifying
-4 + -1x = 0

Solving
-4 + -1x = 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 + -1x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1x = 0 + 4
-1x = 0 + 4

Combine like terms: 0 + 4 = 4
-1x = 4

Divide each side by '-1'.
x = -4

Simplifying
x = -4

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

Simplifying
3 + -2x = 0

Solving
3 + -2x = 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 + -2x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -2x = 0 + -3
-2x = 0 + -3

Combine like terms: 0 + -3 = -3
-2x = -3

Divide each side by '-2'.
x = 1.5

Simplifying
x = 1.5
Solution
x = {-4, 1.5}

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