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

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


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

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

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

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

Combine like terms: 9u + 7u = 16u
(63 + 16u + u2) = 0

Solving
63 + 16u + u2 = 0

Solving for variable 'u'.

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

Solution

u = {-9, -7}

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