(x+4)(2x-5)=0

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Solution for (x+4)(2x-5)=0 equation:


Simplifying
(x + 4)(2x + -5) = 0

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

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

Multiply (4 + x) * (-5 + 2x)
(4(-5 + 2x) + x(-5 + 2x)) = 0
((-5 * 4 + 2x * 4) + x(-5 + 2x)) = 0
((-20 + 8x) + x(-5 + 2x)) = 0
(-20 + 8x + (-5 * x + 2x * x)) = 0
(-20 + 8x + (-5x + 2x2)) = 0

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

Solving
-20 + 3x + 2x2 = 0

Solving for variable 'x'.

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

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 '(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 = {-4, 2.5}

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