2r(2r+6)+r(9r+8)=

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Solution for 2r(2r+6)+r(9r+8)= equation:


Simplifying
2r(2r + 6) + r(9r + 8) = 0

Reorder the terms:
2r(6 + 2r) + r(9r + 8) = 0
(6 * 2r + 2r * 2r) + r(9r + 8) = 0
(12r + 4r2) + r(9r + 8) = 0

Reorder the terms:
12r + 4r2 + r(8 + 9r) = 0
12r + 4r2 + (8 * r + 9r * r) = 0
12r + 4r2 + (8r + 9r2) = 0

Reorder the terms:
12r + 8r + 4r2 + 9r2 = 0

Combine like terms: 12r + 8r = 20r
20r + 4r2 + 9r2 = 0

Combine like terms: 4r2 + 9r2 = 13r2
20r + 13r2 = 0

Solving
20r + 13r2 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), 'r'.
r(20 + 13r) = 0

Subproblem 1

Set the factor 'r' equal to zero and attempt to solve: Simplifying r = 0 Solving r = 0 Move all terms containing r to the left, all other terms to the right. Simplifying r = 0

Subproblem 2

Set the factor '(20 + 13r)' equal to zero and attempt to solve: Simplifying 20 + 13r = 0 Solving 20 + 13r = 0 Move all terms containing r to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 13r = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 13r = 0 + -20 13r = 0 + -20 Combine like terms: 0 + -20 = -20 13r = -20 Divide each side by '13'. r = -1.538461538 Simplifying r = -1.538461538

Solution

r = {0, -1.538461538}

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