(-9r^3+2r-1)-(-5r^2+r+8)=

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Solution for (-9r^3+2r-1)-(-5r^2+r+8)= equation: 


Simplifying
(-9r3 + 2r + -1) + -1(-5r2 + r + 8) = 0

Reorder the terms:
(-1 + 2r + -9r3) + -1(-5r2 + r + 8) = 0

Remove parenthesis around (-1 + 2r + -9r3)
-1 + 2r + -9r3 + -1(-5r2 + r + 8) = 0

Reorder the terms:
-1 + 2r + -9r3 + -1(8 + r + -5r2) = 0
-1 + 2r + -9r3 + (8 * -1 + r * -1 + -5r2 * -1) = 0
-1 + 2r + -9r3 + (-8 + -1r + 5r2) = 0

Reorder the terms:
-1 + -8 + 2r + -1r + 5r2 + -9r3 = 0

Combine like terms: -1 + -8 = -9
-9 + 2r + -1r + 5r2 + -9r3 = 0

Combine like terms: 2r + -1r = 1r
-9 + 1r + 5r2 + -9r3 = 0

Solving
-9 + 1r + 5r2 + -9r3 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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