(x-1)(4x+5)=0

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Solution for (x-1)(4x+5)=0 equation:


Simplifying
(x + -1)(4x + 5) = 0

Reorder the terms:
(-1 + x)(4x + 5) = 0

Reorder the terms:
(-1 + x)(5 + 4x) = 0

Multiply (-1 + x) * (5 + 4x)
(-1(5 + 4x) + x(5 + 4x)) = 0
((5 * -1 + 4x * -1) + x(5 + 4x)) = 0
((-5 + -4x) + x(5 + 4x)) = 0
(-5 + -4x + (5 * x + 4x * x)) = 0
(-5 + -4x + (5x + 4x2)) = 0

Combine like terms: -4x + 5x = 1x
(-5 + 1x + 4x2) = 0

Solving
-5 + 1x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-5 + -4x)(1 + -1x) = 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 '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1

Solution

x = {-1.25, 1}

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