(5u+7)(9+u)=0

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Solution for (5u+7)(9+u)=0 equation:


Simplifying
(5u + 7)(9 + u) = 0

Reorder the terms:
(7 + 5u)(9 + u) = 0

Multiply (7 + 5u) * (9 + u)
(7(9 + u) + 5u * (9 + u)) = 0
((9 * 7 + u * 7) + 5u * (9 + u)) = 0
((63 + 7u) + 5u * (9 + u)) = 0
(63 + 7u + (9 * 5u + u * 5u)) = 0
(63 + 7u + (45u + 5u2)) = 0

Combine like terms: 7u + 45u = 52u
(63 + 52u + 5u2) = 0

Solving
63 + 52u + 5u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(9 + u)(7 + 5u) = 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 + 5u)' equal to zero and attempt to solve: Simplifying 7 + 5u = 0 Solving 7 + 5u = 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 + 5u = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 5u = 0 + -7 5u = 0 + -7 Combine like terms: 0 + -7 = -7 5u = -7 Divide each side by '5'. u = -1.4 Simplifying u = -1.4

Solution

u = {-9, -1.4}

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