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

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


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

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

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

Multiply (5 + 4x) * (-3 + 4x)
(5(-3 + 4x) + 4x * (-3 + 4x)) = 0
((-3 * 5 + 4x * 5) + 4x * (-3 + 4x)) = 0
((-15 + 20x) + 4x * (-3 + 4x)) = 0
(-15 + 20x + (-3 * 4x + 4x * 4x)) = 0
(-15 + 20x + (-12x + 16x2)) = 0

Combine like terms: 20x + -12x = 8x
(-15 + 8x + 16x2) = 0

Solving
-15 + 8x + 16x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-5 + -4x)(3 + -4x) = 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 '(3 + -4x)' equal to zero and attempt to solve: Simplifying 3 + -4x = 0 Solving 3 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -4x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4x = 0 + -3 -4x = 0 + -3 Combine like terms: 0 + -3 = -3 -4x = -3 Divide each side by '-4'. x = 0.75 Simplifying x = 0.75

Solution

x = {-1.25, 0.75}

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