(3r^2-16r+5)(2r+5)=0

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Solution for (3r^2-16r+5)(2r+5)=0 equation: 


Simplifying
(3r2 + -16r + 5)(2r + 5) = 0

Reorder the terms:
(5 + -16r + 3r2)(2r + 5) = 0

Reorder the terms:
(5 + -16r + 3r2)(5 + 2r) = 0

Multiply (5 + -16r + 3r2) * (5 + 2r)
(5(5 + 2r) + -16r * (5 + 2r) + 3r2 * (5 + 2r)) = 0
((5 * 5 + 2r * 5) + -16r * (5 + 2r) + 3r2 * (5 + 2r)) = 0
((25 + 10r) + -16r * (5 + 2r) + 3r2 * (5 + 2r)) = 0
(25 + 10r + (5 * -16r + 2r * -16r) + 3r2 * (5 + 2r)) = 0
(25 + 10r + (-80r + -32r2) + 3r2 * (5 + 2r)) = 0
(25 + 10r + -80r + -32r2 + (5 * 3r2 + 2r * 3r2)) = 0
(25 + 10r + -80r + -32r2 + (15r2 + 6r3)) = 0

Combine like terms: 10r + -80r = -70r
(25 + -70r + -32r2 + 15r2 + 6r3) = 0

Combine like terms: -32r2 + 15r2 = -17r2
(25 + -70r + -17r2 + 6r3) = 0

Solving
25 + -70r + -17r2 + 6r3 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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