2.2x²-5xy+2y²+3x-3y+1 3.2x²-7xy+6y²+2x-y-12 4.a²-b²+4a+2b+3
问题描述:
2.2x²-5xy+2y²+3x-3y+1 3.2x²-7xy+6y²+2x-y-12 4.a²-b²+4a+2b+3
答
2.2x²-5xy+2y²+3x-3y+1 3.2x²-7xy+6y²+2x-y-12 4.a²-b²+4a+2b+3