因式分解练习题4m²-n²=0.81a²-0.04b²=2x²-8=a-a三次方=1-x四次方=
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因式分解练习题4m²-n²=0.81a²-0.04b²=2x²-8=a-a三次方=1-x四次方=
因式分解练习题
4m²-n²=
0.81a²-0.04b²=
2x²-8=
a-a三次方=
1-x四次方=
因式分解练习题4m²-n²=0.81a²-0.04b²=2x²-8=a-a三次方=1-x四次方=
4m²-n²=(2m+n)(2m-n)
0.81a²-0.04b²=(0.9a+0.2b)(0.9a-0.2b)
2x²-8=2(x²-4)=2(x+2)(x-2)
a-a三次方=a(1-a²)=a(1+a)(1-a)
1-x四次方=(1+x²)(1-x²)=(1+x²)(1+x)(1-x)