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-81x^{6}-405x^{5}-747x^{4}-765x^{3}-498x^{2}-180x-23
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-81x^{6}-405x^{5}-747x^{4}-765x^{3}-498x^{2}-180x-23
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-405x^{5}-747x^{4}-81x^{6}-765x^{3}-498x^{2}-180x-24+1
Use the distributive property to multiply 9x^{4}+30x^{3}+27x^{2}+20x+4 by -15x-6-9x^{2} and combine like terms.
-405x^{5}-747x^{4}-81x^{6}-765x^{3}-498x^{2}-180x-23
Add -24 and 1 to get -23.
-405x^{5}-747x^{4}-81x^{6}-765x^{3}-498x^{2}-180x-24+1
Use the distributive property to multiply 9x^{4}+30x^{3}+27x^{2}+20x+4 by -15x-6-9x^{2} and combine like terms.
-405x^{5}-747x^{4}-81x^{6}-765x^{3}-498x^{2}-180x-23
Add -24 and 1 to get -23.
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