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Simplifying 10r2 + -3r + -7 = 0 Reorder the terms: -7 + -3r + 10r2 = 0 Solving -7 + -3r + 10r2 = 0 Solving for variable 'r'. Factor a trinomial. (-7 + -10r)(1 + -1r) = 0Subproblem 1
Set the factor '(-7 + -10r)' equal to zero and attempt to solve: Simplifying -7 + -10r = 0 Solving -7 + -10r = 0 Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -10r = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -10r = 0 + 7 -10r = 0 + 7 Combine like terms: 0 + 7 = 7 -10r = 7 Divide each side by '-10'. r = -0.7 Simplifying r = -0.7Subproblem 2
Set the factor '(1 + -1r)' equal to zero and attempt to solve: Simplifying 1 + -1r = 0 Solving 1 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1r = 0 + -1 -1r = 0 + -1 Combine like terms: 0 + -1 = -1 -1r = -1 Divide each side by '-1'. r = 1 Simplifying r = 1Solution
r = {-0.7, 1}
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