(4v-1)(5v+4)=

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


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

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

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

Multiply (-1 + 4v) * (4 + 5v)
(-1(4 + 5v) + 4v * (4 + 5v)) = 0
((4 * -1 + 5v * -1) + 4v * (4 + 5v)) = 0
((-4 + -5v) + 4v * (4 + 5v)) = 0
(-4 + -5v + (4 * 4v + 5v * 4v)) = 0
(-4 + -5v + (16v + 20v2)) = 0

Combine like terms: -5v + 16v = 11v
(-4 + 11v + 20v2) = 0

Solving
-4 + 11v + 20v2 = 0

Solving for variable 'v'.

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

Subproblem 1

Set the factor '(-4 + -5v)' equal to zero and attempt to solve: Simplifying -4 + -5v = 0 Solving -4 + -5v = 0 Move all terms containing v to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -5v = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5v = 0 + 4 -5v = 0 + 4 Combine like terms: 0 + 4 = 4 -5v = 4 Divide each side by '-5'. v = -0.8 Simplifying v = -0.8

Subproblem 2

Set the factor '(1 + -4v)' equal to zero and attempt to solve: Simplifying 1 + -4v = 0 Solving 1 + -4v = 0 Move all terms containing v to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -4v = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4v = 0 + -1 -4v = 0 + -1 Combine like terms: 0 + -1 = -1 -4v = -1 Divide each side by '-4'. v = 0.25 Simplifying v = 0.25

Solution

v = {-0.8, 0.25}

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