因式分解:1.4a+16ab+16b² 2.25a²-80a+64 3.3x³-6x²y+3xy²

问题描述:

因式分解:1.4a+16ab+16b² 2.25a²-80a+64 3.3x³-6x²y+3xy²

1.4a+16ab+16b²=4(a+4ab+4b²) 1.4a²+16ab+16b²=4(a²+4ab+4b²)=4(a+2b)²2.25a²-80a+64=(5a-8)² 3.3x³-6x²y+3xy²=3x(x²-2xy+y²)=3x(x-y)...