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

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Solution for (4-w)(5w+7)=0 equation:


Simplifying
(4 + -1w)(5w + 7) = 0

Reorder the terms:
(4 + -1w)(7 + 5w) = 0

Multiply (4 + -1w) * (7 + 5w)
(4(7 + 5w) + -1w * (7 + 5w)) = 0
((7 * 4 + 5w * 4) + -1w * (7 + 5w)) = 0
((28 + 20w) + -1w * (7 + 5w)) = 0
(28 + 20w + (7 * -1w + 5w * -1w)) = 0
(28 + 20w + (-7w + -5w2)) = 0

Combine like terms: 20w + -7w = 13w
(28 + 13w + -5w2) = 0

Solving
28 + 13w + -5w2 = 0

Solving for variable 'w'.

Factor a trinomial.
(4 + -1w)(7 + 5w) = 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 '(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 = {4, -1.4}

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