(8+u)(3u-7)=0

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Solution for (8+u)(3u-7)=0 equation: 


Simplifying
(8 + u)(3u + -7) = 0

Reorder the terms:
(8 + u)(-7 + 3u) = 0

Multiply (8 + u) * (-7 + 3u)
(8(-7 + 3u) + u(-7 + 3u)) = 0
((-7 * 8 + 3u * 8) + u(-7 + 3u)) = 0
((-56 + 24u) + u(-7 + 3u)) = 0
(-56 + 24u + (-7 * u + 3u * u)) = 0
(-56 + 24u + (-7u + 3u2)) = 0

Combine like terms: 24u + -7u = 17u
(-56 + 17u + 3u2) = 0

Solving
-56 + 17u + 3u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-8 + -1u)(7 + -3u) = 0


Subproblem 1
Set the factor '(-8 + -1u)' equal to zero and attempt to solve:

Simplifying
-8 + -1u = 0

Solving
-8 + -1u = 0

Move all terms containing u to the left, all other terms to the right.

Add '8' to each side of the equation.
-8 + 8 + -1u = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -1u = 0 + 8
-1u = 0 + 8

Combine like terms: 0 + 8 = 8
-1u = 8

Divide each side by '-1'.
u = -8

Simplifying
u = -8

Subproblem 2
Set the factor '(7 + -3u)' equal to zero and attempt to solve:

Simplifying
7 + -3u = 0

Solving
7 + -3u = 0

Move all terms containing u to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + -3u = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -3u = 0 + -7
-3u = 0 + -7

Combine like terms: 0 + -7 = -7
-3u = -7

Divide each side by '-3'.
u = 2.333333333

Simplifying
u = 2.333333333
Solution
u = {-8, 2.333333333}

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