(3xy²)²+(-4xy³)·(-xy)怎样做.
3x²y-﹛xy-[3xy-(4xy²+½xy)]-4x²y﹜
3(xy-xy)-2(xy+xy)+3xy
3x²-xy-4xy²-3x+4y=0怎么做
-3(2x²-xy)+4(x²+xy-6)
(3xy)² · (x²+xy-y²)-3xy(3x³y+3x²y
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
【回答后给分】【初一下】计算:①(4xy)·(-2xy³) ②(-xy²z³)²
1.先化简再求值(½ x²y+1/5 xy²-¼xy)·(-½xy
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
计算 [-(xy)²]³
1/2x²-1/3XY+XY-2/3x² 合并同类项
3(x²-2xy)-2(-3xy+y²)