(u-9)(u-4)=0

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Solution for (u-9)(u-4)=0 equation:


Simplifying
(u + -9)(u + -4) = 0

Reorder the terms:
(-9 + u)(u + -4) = 0

Reorder the terms:
(-9 + u)(-4 + u) = 0

Multiply (-9 + u) * (-4 + u)
(-9(-4 + u) + u(-4 + u)) = 0
((-4 * -9 + u * -9) + u(-4 + u)) = 0
((36 + -9u) + u(-4 + u)) = 0
(36 + -9u + (-4 * u + u * u)) = 0
(36 + -9u + (-4u + u2)) = 0

Combine like terms: -9u + -4u = -13u
(36 + -13u + u2) = 0

Solving
36 + -13u + u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(4 + -1u)(9 + -1u) = 0

Subproblem 1

Set the factor '(4 + -1u)' equal to zero and attempt to solve: Simplifying 4 + -1u = 0 Solving 4 + -1u = 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 + -1u = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1u = 0 + -4 -1u = 0 + -4 Combine like terms: 0 + -4 = -4 -1u = -4 Divide each side by '-1'. u = 4 Simplifying u = 4

Subproblem 2

Set the factor '(9 + -1u)' equal to zero and attempt to solve: Simplifying 9 + -1u = 0 Solving 9 + -1u = 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 + -1u = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1u = 0 + -9 -1u = 0 + -9 Combine like terms: 0 + -9 = -9 -1u = -9 Divide each side by '-1'. u = 9 Simplifying u = 9

Solution

u = {4, 9}

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