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Simplifying 3r2 + -1r + -28 = -4 Reorder the terms: -28 + -1r + 3r2 = -4 Solving -28 + -1r + 3r2 = -4 Solving for variable 'r'. Reorder the terms: -28 + 4 + -1r + 3r2 = -4 + 4 Combine like terms: -28 + 4 = -24 -24 + -1r + 3r2 = -4 + 4 Combine like terms: -4 + 4 = 0 -24 + -1r + 3r2 = 0 Factor a trinomial. (-8 + -3r)(3 + -1r) = 0Subproblem 1
Set the factor '(-8 + -3r)' equal to zero and attempt to solve: Simplifying -8 + -3r = 0 Solving -8 + -3r = 0 Move all terms containing r to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -3r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -3r = 0 + 8 -3r = 0 + 8 Combine like terms: 0 + 8 = 8 -3r = 8 Divide each side by '-3'. r = -2.666666667 Simplifying r = -2.666666667Subproblem 2
Set the factor '(3 + -1r)' equal to zero and attempt to solve: Simplifying 3 + -1r = 0 Solving 3 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1r = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1r = 0 + -3 -1r = 0 + -3 Combine like terms: 0 + -3 = -3 -1r = -3 Divide each side by '-1'. r = 3 Simplifying r = 3Solution
r = {-2.666666667, 3}
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