(8r-1)(r-7)=0

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Solution for (8r-1)(r-7)=0 equation:


Simplifying
(8r + -1)(r + -7) = 0

Reorder the terms:
(-1 + 8r)(r + -7) = 0

Reorder the terms:
(-1 + 8r)(-7 + r) = 0

Multiply (-1 + 8r) * (-7 + r)
(-1(-7 + r) + 8r * (-7 + r)) = 0
((-7 * -1 + r * -1) + 8r * (-7 + r)) = 0
((7 + -1r) + 8r * (-7 + r)) = 0
(7 + -1r + (-7 * 8r + r * 8r)) = 0
(7 + -1r + (-56r + 8r2)) = 0

Combine like terms: -1r + -56r = -57r
(7 + -57r + 8r2) = 0

Solving
7 + -57r + 8r2 = 0

Solving for variable 'r'.

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

Subproblem 1

Set the factor '(1 + -8r)' equal to zero and attempt to solve: Simplifying 1 + -8r = 0 Solving 1 + -8r = 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 + -8r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -8r = 0 + -1 -8r = 0 + -1 Combine like terms: 0 + -1 = -1 -8r = -1 Divide each side by '-8'. r = 0.125 Simplifying r = 0.125

Subproblem 2

Set the factor '(7 + -1r)' equal to zero and attempt to solve: Simplifying 7 + -1r = 0 Solving 7 + -1r = 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 + -1r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1r = 0 + -7 -1r = 0 + -7 Combine like terms: 0 + -7 = -7 -1r = -7 Divide each side by '-1'. r = 7 Simplifying r = 7

Solution

r = {0.125, 7}

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