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

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


Simplifying
(9 + -1w)(5w + 7) = 0

Reorder the terms:
(9 + -1w)(7 + 5w) = 0

Multiply (9 + -1w) * (7 + 5w)
(9(7 + 5w) + -1w * (7 + 5w)) = 0
((7 * 9 + 5w * 9) + -1w * (7 + 5w)) = 0
((63 + 45w) + -1w * (7 + 5w)) = 0
(63 + 45w + (7 * -1w + 5w * -1w)) = 0
(63 + 45w + (-7w + -5w2)) = 0

Combine like terms: 45w + -7w = 38w
(63 + 38w + -5w2) = 0

Solving
63 + 38w + -5w2 = 0

Solving for variable 'w'.

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

Subproblem 1

Set the factor '(9 + -1w)' equal to zero and attempt to solve: Simplifying 9 + -1w = 0 Solving 9 + -1w = 0 Move all terms containing w to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1w = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1w = 0 + -9 -1w = 0 + -9 Combine like terms: 0 + -9 = -9 -1w = -9 Divide each side by '-1'. w = 9 Simplifying w = 9

Subproblem 2

Set the factor '(7 + 5w)' equal to zero and attempt to solve: Simplifying 7 + 5w = 0 Solving 7 + 5w = 0 Move all terms containing w to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 5w = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 5w = 0 + -7 5w = 0 + -7 Combine like terms: 0 + -7 = -7 5w = -7 Divide each side by '5'. w = -1.4 Simplifying w = -1.4

Solution

w = {9, -1.4}

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