(3u-7)(9-u)=0

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Solution for (3u-7)(9-u)=0 equation:


Simplifying
(3u + -7)(9 + -1u) = 0

Reorder the terms:
(-7 + 3u)(9 + -1u) = 0

Multiply (-7 + 3u) * (9 + -1u)
(-7(9 + -1u) + 3u * (9 + -1u)) = 0
((9 * -7 + -1u * -7) + 3u * (9 + -1u)) = 0
((-63 + 7u) + 3u * (9 + -1u)) = 0
(-63 + 7u + (9 * 3u + -1u * 3u)) = 0
(-63 + 7u + (27u + -3u2)) = 0

Combine like terms: 7u + 27u = 34u
(-63 + 34u + -3u2) = 0

Solving
-63 + 34u + -3u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-9 + u)(7 + -3u) = 0

Subproblem 1

Set the factor '(-9 + u)' equal to zero and attempt to solve: Simplifying -9 + u = 0 Solving -9 + u = 0 Move all terms containing u to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + u = 0 + 9 Combine like terms: -9 + 9 = 0 0 + u = 0 + 9 u = 0 + 9 Combine like terms: 0 + 9 = 9 u = 9 Simplifying u = 9

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 = {9, 2.333333333}

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