(8r+1)(r+2)=0

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Solution for (8r+1)(r+2)=0 equation:


Simplifying
(8r + 1)(r + 2) = 0

Reorder the terms:
(1 + 8r)(r + 2) = 0

Reorder the terms:
(1 + 8r)(2 + r) = 0

Multiply (1 + 8r) * (2 + r)
(1(2 + r) + 8r * (2 + r)) = 0
((2 * 1 + r * 1) + 8r * (2 + r)) = 0
((2 + 1r) + 8r * (2 + r)) = 0
(2 + 1r + (2 * 8r + r * 8r)) = 0
(2 + 1r + (16r + 8r2)) = 0

Combine like terms: 1r + 16r = 17r
(2 + 17r + 8r2) = 0

Solving
2 + 17r + 8r2 = 0

Solving for variable 'r'.

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

Subproblem 1

Set the factor '(2 + r)' equal to zero and attempt to solve: Simplifying 2 + r = 0 Solving 2 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + r = 0 + -2 r = 0 + -2 Combine like terms: 0 + -2 = -2 r = -2 Simplifying r = -2

Subproblem 2

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

Solution

r = {-2, -0.125}

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