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Question

Subtract the second polynomial from the first.
(i) 5x2-2y + 9 ; 3x2 + 5y -7 (ii) 2x2 + 3x + 5 ; x 2 -2x + 3

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Solution


(i)
5x2-2y+9-3x2+5y-7=5x2-2y+9-3x2-5y+7=5x2-3x2-2y-5y+9+7=2x2-7y+16
(ii)
2x2+3x+5-x2-2x+3=2x2+3x+5-x2+2x-3=2x2-x2+3x+2x+5-3=x2+5x+2

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