(2m-7)(4m+5)=

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Solution for (2m-7)(4m+5)= equation:


Simplifying
(2m + -7)(4m + 5) = 0

Reorder the terms:
(-7 + 2m)(4m + 5) = 0

Reorder the terms:
(-7 + 2m)(5 + 4m) = 0

Multiply (-7 + 2m) * (5 + 4m)
(-7(5 + 4m) + 2m * (5 + 4m)) = 0
((5 * -7 + 4m * -7) + 2m * (5 + 4m)) = 0
((-35 + -28m) + 2m * (5 + 4m)) = 0
(-35 + -28m + (5 * 2m + 4m * 2m)) = 0
(-35 + -28m + (10m + 8m2)) = 0

Combine like terms: -28m + 10m = -18m
(-35 + -18m + 8m2) = 0

Solving
-35 + -18m + 8m2 = 0

Solving for variable 'm'.

Factor a trinomial.
(-5 + -4m)(7 + -2m) = 0

Subproblem 1

Set the factor '(-5 + -4m)' equal to zero and attempt to solve: Simplifying -5 + -4m = 0 Solving -5 + -4m = 0 Move all terms containing m to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -4m = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -4m = 0 + 5 -4m = 0 + 5 Combine like terms: 0 + 5 = 5 -4m = 5 Divide each side by '-4'. m = -1.25 Simplifying m = -1.25

Subproblem 2

Set the factor '(7 + -2m)' equal to zero and attempt to solve: Simplifying 7 + -2m = 0 Solving 7 + -2m = 0 Move all terms containing m to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2m = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2m = 0 + -7 -2m = 0 + -7 Combine like terms: 0 + -7 = -7 -2m = -7 Divide each side by '-2'. m = 3.5 Simplifying m = 3.5

Solution

m = {-1.25, 3.5}

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