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

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


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

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

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

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

Combine like terms: -4x + 15x = 11x
(-20 + 11x + 3x2) = 0

Solving
-20 + 11x + 3x2 = 0

Solving for variable 'x'.

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

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 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 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(4 + -3x)' equal to zero and attempt to solve: Simplifying 4 + -3x = 0 Solving 4 + -3x = 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 + -3x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -3x = 0 + -4 -3x = 0 + -4 Combine like terms: 0 + -4 = -4 -3x = -4 Divide each side by '-3'. x = 1.333333333 Simplifying x = 1.333333333

Solution

x = {-5, 1.333333333}

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