7m^2+21m-66=4

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Solution for 7m^2+21m-66=4 equation:


Simplifying
7m2 + 21m + -66 = 4

Reorder the terms:
-66 + 21m + 7m2 = 4

Solving
-66 + 21m + 7m2 = 4

Solving for variable 'm'.

Reorder the terms:
-66 + -4 + 21m + 7m2 = 4 + -4

Combine like terms: -66 + -4 = -70
-70 + 21m + 7m2 = 4 + -4

Combine like terms: 4 + -4 = 0
-70 + 21m + 7m2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-10 + 3m + m2) = 0

Factor a trinomial.
7((-5 + -1m)(2 + -1m)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(-5 + -1m)' equal to zero and attempt to solve: Simplifying -5 + -1m = 0 Solving -5 + -1m = 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 + -1m = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1m = 0 + 5 -1m = 0 + 5 Combine like terms: 0 + 5 = 5 -1m = 5 Divide each side by '-1'. m = -5 Simplifying m = -5

Subproblem 2

Set the factor '(2 + -1m)' equal to zero and attempt to solve: Simplifying 2 + -1m = 0 Solving 2 + -1m = 0 Move all terms containing m to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1m = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1m = 0 + -2 -1m = 0 + -2 Combine like terms: 0 + -2 = -2 -1m = -2 Divide each side by '-1'. m = 2 Simplifying m = 2

Solution

m = {-5, 2}

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