(u+7)(u+4)=0

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Solution for (u+7)(u+4)=0 equation:


Simplifying
(u + 7)(u + 4) = 0

Reorder the terms:
(7 + u)(u + 4) = 0

Reorder the terms:
(7 + u)(4 + u) = 0

Multiply (7 + u) * (4 + u)
(7(4 + u) + u(4 + u)) = 0
((4 * 7 + u * 7) + u(4 + u)) = 0
((28 + 7u) + u(4 + u)) = 0
(28 + 7u + (4 * u + u * u)) = 0
(28 + 7u + (4u + u2)) = 0

Combine like terms: 7u + 4u = 11u
(28 + 11u + u2) = 0

Solving
28 + 11u + u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(7 + u)(4 + u) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(4 + u)' equal to zero and attempt to solve: Simplifying 4 + u = 0 Solving 4 + u = 0 Move all terms containing u to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + u = 0 + -4 u = 0 + -4 Combine like terms: 0 + -4 = -4 u = -4 Simplifying u = -4

Solution

u = {-7, -4}

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