3r^2-17r=56

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Solution for 3r^2-17r=56 equation:


Simplifying
3r2 + -17r = 56

Reorder the terms:
-17r + 3r2 = 56

Solving
-17r + 3r2 = 56

Solving for variable 'r'.

Reorder the terms:
-56 + -17r + 3r2 = 56 + -56

Combine like terms: 56 + -56 = 0
-56 + -17r + 3r2 = 0

Factor a trinomial.
(-7 + -3r)(8 + -1r) = 0

Subproblem 1

Set the factor '(-7 + -3r)' equal to zero and attempt to solve: Simplifying -7 + -3r = 0 Solving -7 + -3r = 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 + -3r = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -3r = 0 + 7 -3r = 0 + 7 Combine like terms: 0 + 7 = 7 -3r = 7 Divide each side by '-3'. r = -2.333333333 Simplifying r = -2.333333333

Subproblem 2

Set the factor '(8 + -1r)' equal to zero and attempt to solve: Simplifying 8 + -1r = 0 Solving 8 + -1r = 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 + -1r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r = 0 + -8 -1r = 0 + -8 Combine like terms: 0 + -8 = -8 -1r = -8 Divide each side by '-1'. r = 8 Simplifying r = 8

Solution

r = {-2.333333333, 8}

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