8r^2-35r-25=0

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Solution for 8r^2-35r-25=0 equation:


Simplifying
8r2 + -35r + -25 = 0

Reorder the terms:
-25 + -35r + 8r2 = 0

Solving
-25 + -35r + 8r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(-5 + -8r)(5 + -1r) = 0

Subproblem 1

Set the factor '(-5 + -8r)' equal to zero and attempt to solve: Simplifying -5 + -8r = 0 Solving -5 + -8r = 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 + -8r = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -8r = 0 + 5 -8r = 0 + 5 Combine like terms: 0 + 5 = 5 -8r = 5 Divide each side by '-8'. r = -0.625 Simplifying r = -0.625

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 = {-0.625, 5}

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