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

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


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

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

Multiply (7 + u) * (-9 + 5u)
(7(-9 + 5u) + u(-9 + 5u)) = 0
((-9 * 7 + 5u * 7) + u(-9 + 5u)) = 0
((-63 + 35u) + u(-9 + 5u)) = 0
(-63 + 35u + (-9 * u + 5u * u)) = 0
(-63 + 35u + (-9u + 5u2)) = 0

Combine like terms: 35u + -9u = 26u
(-63 + 26u + 5u2) = 0

Solving
-63 + 26u + 5u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-7 + -1u)(9 + -5u) = 0

Subproblem 1

Set the factor '(-7 + -1u)' equal to zero and attempt to solve: Simplifying -7 + -1u = 0 Solving -7 + -1u = 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 + -1u = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1u = 0 + 7 -1u = 0 + 7 Combine like terms: 0 + 7 = 7 -1u = 7 Divide each side by '-1'. u = -7 Simplifying u = -7

Subproblem 2

Set the factor '(9 + -5u)' equal to zero and attempt to solve: Simplifying 9 + -5u = 0 Solving 9 + -5u = 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 + -5u = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5u = 0 + -9 -5u = 0 + -9 Combine like terms: 0 + -9 = -9 -5u = -9 Divide each side by '-5'. u = 1.8 Simplifying u = 1.8

Solution

u = {-7, 1.8}

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