2*(x+1)*(2x-5)=0

Solution for 2*(x+1)*(2x-5)=0 equation:

Simplifying
2(x + 1)(2x + -5) = 0

Reorder the terms:
2(1 + x)(2x + -5) = 0

Reorder the terms:
2(1 + x)(-5 + 2x) = 0

Multiply (1 + x) * (-5 + 2x)
2(1(-5 + 2x) + x(-5 + 2x)) = 0
2((-5 * 1 + 2x * 1) + x(-5 + 2x)) = 0
2((-5 + 2x) + x(-5 + 2x)) = 0
2(-5 + 2x + (-5 * x + 2x * x)) = 0
2(-5 + 2x + (-5x + 2x2)) = 0

Combine like terms: 2x + -5x = -3x
2(-5 + -3x + 2x2) = 0
(-5 * 2 + -3x * 2 + 2x2 * 2) = 0
(-10 + -6x + 4x2) = 0

Solving
-10 + -6x + 4x2 = 0

Solving for variable 'x'.

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

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

Ignore the factor 2.
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 '(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
Solution
x = {-1, 2.5}