(4x+9)(x-5)=

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Solution for (4x+9)(x-5)= equation:


Simplifying
(4x + 9)(x + -5) = 0

Reorder the terms:
(9 + 4x)(x + -5) = 0

Reorder the terms:
(9 + 4x)(-5 + x) = 0

Multiply (9 + 4x) * (-5 + x)
(9(-5 + x) + 4x * (-5 + x)) = 0
((-5 * 9 + x * 9) + 4x * (-5 + x)) = 0
((-45 + 9x) + 4x * (-5 + x)) = 0
(-45 + 9x + (-5 * 4x + x * 4x)) = 0
(-45 + 9x + (-20x + 4x2)) = 0

Combine like terms: 9x + -20x = -11x
(-45 + -11x + 4x2) = 0

Solving
-45 + -11x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -4x)(5 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -4x)' equal to zero and attempt to solve: Simplifying -9 + -4x = 0 Solving -9 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -4x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -4x = 0 + 9 -4x = 0 + 9 Combine like terms: 0 + 9 = 9 -4x = 9 Divide each side by '-4'. x = -2.25 Simplifying x = -2.25

Subproblem 2

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

Solution

x = {-2.25, 5}

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