Jawabanmu

2014-08-08T22:01:15+07:00
Penjumlahan
(x³-7x²+4x-1) + (2x³+4x²-5x+8)
=3x³-3x²-x+7

pengurangan
(x³-7x²+4x-1) - (2x³+4x²-5x+8)
= -x³-11x²+9x-9

perkalian
(2x+3)(x²-4x+1)
= 2x³-5x²-10x+3





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