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

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


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

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

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

Multiply (-5 + 9x) * (5 + 4x)
(-5(5 + 4x) + 9x * (5 + 4x)) = 0
((5 * -5 + 4x * -5) + 9x * (5 + 4x)) = 0
((-25 + -20x) + 9x * (5 + 4x)) = 0
(-25 + -20x + (5 * 9x + 4x * 9x)) = 0
(-25 + -20x + (45x + 36x2)) = 0

Combine like terms: -20x + 45x = 25x
(-25 + 25x + 36x2) = 0

Solving
-25 + 25x + 36x2 = 0

Solving for variable 'x'.

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

Subproblem 1

Set the factor '(-5 + -4x)' equal to zero and attempt to solve: Simplifying -5 + -4x = 0 Solving -5 + -4x = 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 + -4x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -4x = 0 + 5 -4x = 0 + 5 Combine like terms: 0 + 5 = 5 -4x = 5 Divide each side by '-4'. x = -1.25 Simplifying x = -1.25

Subproblem 2

Set the factor '(5 + -9x)' equal to zero and attempt to solve: Simplifying 5 + -9x = 0 Solving 5 + -9x = 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 + -9x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -9x = 0 + -5 -9x = 0 + -5 Combine like terms: 0 + -5 = -5 -9x = -5 Divide each side by '-9'. x = 0.5555555556 Simplifying x = 0.5555555556

Solution

x = {-1.25, 0.5555555556}

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