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

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


Simplifying
(4v + 5)(7 + -1v) = 0

Reorder the terms:
(5 + 4v)(7 + -1v) = 0

Multiply (5 + 4v) * (7 + -1v)
(5(7 + -1v) + 4v * (7 + -1v)) = 0
((7 * 5 + -1v * 5) + 4v * (7 + -1v)) = 0
((35 + -5v) + 4v * (7 + -1v)) = 0
(35 + -5v + (7 * 4v + -1v * 4v)) = 0
(35 + -5v + (28v + -4v2)) = 0

Combine like terms: -5v + 28v = 23v
(35 + 23v + -4v2) = 0

Solving
35 + 23v + -4v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(7 + -1v)(5 + 4v) = 0

Subproblem 1

Set the factor '(7 + -1v)' equal to zero and attempt to solve: Simplifying 7 + -1v = 0 Solving 7 + -1v = 0 Move all terms containing v to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1v = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1v = 0 + -7 -1v = 0 + -7 Combine like terms: 0 + -7 = -7 -1v = -7 Divide each side by '-1'. v = 7 Simplifying v = 7

Subproblem 2

Set the factor '(5 + 4v)' equal to zero and attempt to solve: Simplifying 5 + 4v = 0 Solving 5 + 4v = 0 Move all terms containing v to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 4v = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4v = 0 + -5 4v = 0 + -5 Combine like terms: 0 + -5 = -5 4v = -5 Divide each side by '4'. v = -1.25 Simplifying v = -1.25

Solution

v = {7, -1.25}

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