4(x-1)(5x+3)=0

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Solution for 4(x-1)(5x+3)=0 equation: 


Simplifying
4(x + -1)(5x + 3) = 0

Reorder the terms:
4(-1 + x)(5x + 3) = 0

Reorder the terms:
4(-1 + x)(3 + 5x) = 0

Multiply (-1 + x) * (3 + 5x)
4(-1(3 + 5x) + x(3 + 5x)) = 0
4((3 * -1 + 5x * -1) + x(3 + 5x)) = 0
4((-3 + -5x) + x(3 + 5x)) = 0
4(-3 + -5x + (3 * x + 5x * x)) = 0
4(-3 + -5x + (3x + 5x2)) = 0

Combine like terms: -5x + 3x = -2x
4(-3 + -2x + 5x2) = 0
(-3 * 4 + -2x * 4 + 5x2 * 4) = 0
(-12 + -8x + 20x2) = 0

Solving
-12 + -8x + 20x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-3 + -2x + 5x2) = 0

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

Ignore the factor 4.

Subproblem 1
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

Subproblem 2
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
Solution
x = {-0.6, 1}

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