(9r-8s)(5r^3-4rs-s^2)=

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Solution for (9r-8s)(5r^3-4rs-s^2)= equation: 


Simplifying
(9r + -8s)(5r3 + -4rs + -1s2) = 0

Reorder the terms:
(9r + -8s)(-4rs + 5r3 + -1s2) = 0

Multiply (9r + -8s) * (-4rs + 5r3 + -1s2)
(9r * (-4rs + 5r3 + -1s2) + -8s * (-4rs + 5r3 + -1s2)) = 0
((-4rs * 9r + 5r3 * 9r + -1s2 * 9r) + -8s * (-4rs + 5r3 + -1s2)) = 0

Reorder the terms:
((-9rs2 + -36r2s + 45r4) + -8s * (-4rs + 5r3 + -1s2)) = 0
((-9rs2 + -36r2s + 45r4) + -8s * (-4rs + 5r3 + -1s2)) = 0
(-9rs2 + -36r2s + 45r4 + (-4rs * -8s + 5r3 * -8s + -1s2 * -8s)) = 0
(-9rs2 + -36r2s + 45r4 + (32rs2 + -40r3s + 8s3)) = 0

Reorder the terms:
(-9rs2 + 32rs2 + -36r2s + -40r3s + 45r4 + 8s3) = 0

Combine like terms: -9rs2 + 32rs2 = 23rs2
(23rs2 + -36r2s + -40r3s + 45r4 + 8s3) = 0

Solving
23rs2 + -36r2s + -40r3s + 45r4 + 8s3 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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