(4x-5)(4x+7)=0

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Solution for (4x-5)(4x+7)=0 equation:


Simplifying
(4x + -5)(4x + 7) = 0

Reorder the terms:
(-5 + 4x)(4x + 7) = 0

Reorder the terms:
(-5 + 4x)(7 + 4x) = 0

Multiply (-5 + 4x) * (7 + 4x)
(-5(7 + 4x) + 4x * (7 + 4x)) = 0
((7 * -5 + 4x * -5) + 4x * (7 + 4x)) = 0
((-35 + -20x) + 4x * (7 + 4x)) = 0
(-35 + -20x + (7 * 4x + 4x * 4x)) = 0
(-35 + -20x + (28x + 16x2)) = 0

Combine like terms: -20x + 28x = 8x
(-35 + 8x + 16x2) = 0

Solving
-35 + 8x + 16x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -4x)(5 + -4x) = 0

Subproblem 1

Set the factor '(-7 + -4x)' equal to zero and attempt to solve: Simplifying -7 + -4x = 0 Solving -7 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -4x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -4x = 0 + 7 -4x = 0 + 7 Combine like terms: 0 + 7 = 7 -4x = 7 Divide each side by '-4'. x = -1.75 Simplifying x = -1.75

Subproblem 2

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

Solution

x = {-1.75, 1.25}

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