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10. If A =4x3 + 3x-19' B =x3 +8x2-7x + 13 andC =-5x3-6x + 20, find(ii) A - B+ C.(ii) A-B-C.

Answer»

A+B+C=4x³+3x-19+x³+8x²-7x+13-5x³-6x+20=8x²-10x+14A+B-C=4x³+3x-19+x³+8x²-7x+13+5x³+6x-20=10x³+8x²+2x-26A-B-C=4x³+3x-19-x³-8x²+7x-13+5x³+6x-20=x³-8x²+16x-42



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