10r^2-19r=56

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Solution for 10r^2-19r=56 equation:


Simplifying
10r2 + -19r = 56

Reorder the terms:
-19r + 10r2 = 56

Solving
-19r + 10r2 = 56

Solving for variable 'r'.

Reorder the terms:
-56 + -19r + 10r2 = 56 + -56

Combine like terms: 56 + -56 = 0
-56 + -19r + 10r2 = 0

Factor a trinomial.
(-8 + -5r)(7 + -2r) = 0

Subproblem 1

Set the factor '(-8 + -5r)' equal to zero and attempt to solve: Simplifying -8 + -5r = 0 Solving -8 + -5r = 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 + -5r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -5r = 0 + 8 -5r = 0 + 8 Combine like terms: 0 + 8 = 8 -5r = 8 Divide each side by '-5'. r = -1.6 Simplifying r = -1.6

Subproblem 2

Set the factor '(7 + -2r)' equal to zero and attempt to solve: Simplifying 7 + -2r = 0 Solving 7 + -2r = 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 + -2r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2r = 0 + -7 -2r = 0 + -7 Combine like terms: 0 + -7 = -7 -2r = -7 Divide each side by '-2'. r = 3.5 Simplifying r = 3.5

Solution

r = {-1.6, 3.5}

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