3r^2-r-62=8

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Solution for 3r^2-r-62=8 equation:


Simplifying
3r2 + -1r + -62 = 8

Reorder the terms:
-62 + -1r + 3r2 = 8

Solving
-62 + -1r + 3r2 = 8

Solving for variable 'r'.

Reorder the terms:
-62 + -8 + -1r + 3r2 = 8 + -8

Combine like terms: -62 + -8 = -70
-70 + -1r + 3r2 = 8 + -8

Combine like terms: 8 + -8 = 0
-70 + -1r + 3r2 = 0

Factor a trinomial.
(-14 + -3r)(5 + -1r) = 0

Subproblem 1

Set the factor '(-14 + -3r)' equal to zero and attempt to solve: Simplifying -14 + -3r = 0 Solving -14 + -3r = 0 Move all terms containing r to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + -3r = 0 + 14 Combine like terms: -14 + 14 = 0 0 + -3r = 0 + 14 -3r = 0 + 14 Combine like terms: 0 + 14 = 14 -3r = 14 Divide each side by '-3'. r = -4.666666667 Simplifying r = -4.666666667

Subproblem 2

Set the factor '(5 + -1r)' equal to zero and attempt to solve: Simplifying 5 + -1r = 0 Solving 5 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1r = 0 + -5 -1r = 0 + -5 Combine like terms: 0 + -5 = -5 -1r = -5 Divide each side by '-1'. r = 5 Simplifying r = 5

Solution

r = {-4.666666667, 5}

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