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Simplifying 12c2 + 40c + -7 = 0 Reorder the terms: -7 + 40c + 12c2 = 0 Solving -7 + 40c + 12c2 = 0 Solving for variable 'c'. Factor a trinomial. (-7 + -2c)(1 + -6c) = 0Subproblem 1
Set the factor '(-7 + -2c)' equal to zero and attempt to solve: Simplifying -7 + -2c = 0 Solving -7 + -2c = 0 Move all terms containing c to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -2c = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -2c = 0 + 7 -2c = 0 + 7 Combine like terms: 0 + 7 = 7 -2c = 7 Divide each side by '-2'. c = -3.5 Simplifying c = -3.5Subproblem 2
Set the factor '(1 + -6c)' equal to zero and attempt to solve: Simplifying 1 + -6c = 0 Solving 1 + -6c = 0 Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -6c = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -6c = 0 + -1 -6c = 0 + -1 Combine like terms: 0 + -1 = -1 -6c = -1 Divide each side by '-6'. c = 0.1666666667 Simplifying c = 0.1666666667Solution
c = {-3.5, 0.1666666667}
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