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

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Solution for (7-v)(4v+1)=0 equation:


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

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

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

Combine like terms: 28v + -1v = 27v
(7 + 27v + -4v2) = 0

Solving
7 + 27v + -4v2 = 0

Solving for variable 'v'.

Factor a trinomial.
(7 + -1v)(1 + 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 '(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 = {7, -0.25}

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