(2w+9)(4-w)=0

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Solution for (2w+9)(4-w)=0 equation:


Simplifying
(2w + 9)(4 + -1w) = 0

Reorder the terms:
(9 + 2w)(4 + -1w) = 0

Multiply (9 + 2w) * (4 + -1w)
(9(4 + -1w) + 2w * (4 + -1w)) = 0
((4 * 9 + -1w * 9) + 2w * (4 + -1w)) = 0
((36 + -9w) + 2w * (4 + -1w)) = 0
(36 + -9w + (4 * 2w + -1w * 2w)) = 0
(36 + -9w + (8w + -2w2)) = 0

Combine like terms: -9w + 8w = -1w
(36 + -1w + -2w2) = 0

Solving
36 + -1w + -2w2 = 0

Solving for variable 'w'.

Factor a trinomial.
(4 + -1w)(9 + 2w) = 0

Subproblem 1

Set the factor '(4 + -1w)' equal to zero and attempt to solve: Simplifying 4 + -1w = 0 Solving 4 + -1w = 0 Move all terms containing w to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1w = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1w = 0 + -4 -1w = 0 + -4 Combine like terms: 0 + -4 = -4 -1w = -4 Divide each side by '-1'. w = 4 Simplifying w = 4

Subproblem 2

Set the factor '(9 + 2w)' equal to zero and attempt to solve: Simplifying 9 + 2w = 0 Solving 9 + 2w = 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 + 2w = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2w = 0 + -9 2w = 0 + -9 Combine like terms: 0 + -9 = -9 2w = -9 Divide each side by '2'. w = -4.5 Simplifying w = -4.5

Solution

w = {4, -4.5}

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