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

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


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

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

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

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

Combine like terms: -15x + 20x = 5x
(-15 + 5x + 20x2) = 0

Solving
-15 + 5x + 20x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-3 + x + 4x2) = 0

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

Ignore the factor 5.

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

Simplifying
-1 + -1x = 0

Solving
-1 + -1x = 0

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

Add '1' to each side of the equation.
-1 + 1 + -1x = 0 + 1

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

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

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

Simplifying
x = -1

Subproblem 2
Set the factor '(3 + -4x)' equal to zero and attempt to solve:

Simplifying
3 + -4x = 0

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

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

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

Divide each side by '-4'.
x = 0.75

Simplifying
x = 0.75
Solution
x = {-1, 0.75}

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