No. A polynomial is an expression of more than two algebraic terms, and usually contains different powers of the same variable.
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Combine the ' 9r ' and the ' -5r ' . Replace them with ' 4r '.
You have to combine equal terms. -5r-9s+9r+3s-6 = -5r+9r-9s+3s-6 = 4r-6s-6
9-4r
3+10-r+6r = -3+9r+0 13+5r = -3+9r 16 = 4r r = 4
The answer is -r