-16=u(u+8)

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Solution for -16=u(u+8) equation:


Simplifying
-16 = u(u + 8)

Reorder the terms:
-16 = u(8 + u)
-16 = (8 * u + u * u)
-16 = (8u + u2)

Solving
-16 = 8u + u2

Solving for variable 'u'.

Reorder the terms:
-16 + -8u + -1u2 = 8u + -8u + u2 + -1u2

Combine like terms: 8u + -8u = 0
-16 + -8u + -1u2 = 0 + u2 + -1u2
-16 + -8u + -1u2 = u2 + -1u2

Combine like terms: u2 + -1u2 = 0
-16 + -8u + -1u2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(16 + 8u + u2) = 0

Factor a trinomial.
-1((4 + u)(4 + u)) = 0

Ignore the factor -1.

Subproblem 1

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

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 = {-4, -4}

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