❶ 5﹙x-2﹚²+a﹙2-x﹚❷﹙x+y﹚³﹙x+y﹚²-﹙-x-y﹚

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 04:40:45
❶ 5﹙x-2﹚²+a﹙2-x﹚❷﹙x+y﹚³﹙x+y﹚²-﹙-x-y﹚

❶ 5﹙x-2﹚²+a﹙2-x﹚❷﹙x+y﹚³﹙x+y﹚²-﹙-x-y﹚
❶ 5﹙x-2﹚²+a﹙2-x﹚
❷﹙x+y﹚³﹙x+y﹚²-﹙-x-y﹚

❶ 5﹙x-2﹚²+a﹙2-x﹚❷﹙x+y﹚³﹙x+y﹚²-﹙-x-y﹚
❶ 5﹙x-2﹚²+a﹙2-x﹚
=5(x-2)²-a(x-2)
=(x-2)(5x-10-a)
❷﹙x+y﹚³+﹙x+y﹚²-﹙-x-y﹚
=(x+y)³+(x+y)²+(x+y)
=(x+y)[(x+y)²+(x+y)+1]
=(x+y)(x²+2xy+y²+x+y+1)