因式分解 (要过程)81a²-16b² a²+b²-2ab-4a+4b (x+1)²-4x² 4m(m-n)+4n(n-m) (a²+9b²)²-36a²b²

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/14 21:03:00
因式分解 (要过程)81a²-16b² a²+b²-2ab-4a+4b (x+1)²-4x² 4m(m-n)+4n(n-m) (a²+9b²)²-36a²b²
xRN@ML ɅLp72 fDi-ԆįA_pYYilΜ3g>]Y\yx?YYpZ]|䗫b9}0; ݄Ng"T(#F$RHqk"K%h^sj%/

因式分解 (要过程)81a²-16b² a²+b²-2ab-4a+4b (x+1)²-4x² 4m(m-n)+4n(n-m) (a²+9b²)²-36a²b²
因式分解 (要过程)
81a²-16b² a²+b²-2ab-4a+4b (x+1)²-4x² 4m(m-n)+4n(n-m) (a²+9b²)²-36a²b²

因式分解 (要过程)81a²-16b² a²+b²-2ab-4a+4b (x+1)²-4x² 4m(m-n)+4n(n-m) (a²+9b²)²-36a²b²
81a²-16b²
=(9a)²-(4b)²
=(9a+4b)(9a-4b)
a²+b²-2ab-4a+4b
=(a-b)²-4(a-b)
=(a-b)(a-b-4)
(x+1)²-4x²
=(x+1+2x)(x+1-2x)
=(3x+1)(1-x)
4m(m-n)+4n(n-m)
=4m(m-n)-4n(m-n)
=4(m-n)²
(a²+9b²)²-36a²b²
=(a²+9b²+6ab)(a²+9b²-6ab)
=(a+3b)²(a-3b)²

81a²-16b²=(9a+4b)(9a-4b)
a²+b²-2ab-4a+4b=( a²+b²-2ab)-(4a-4b)=(a-b)²-4(a-b)=(a-b)(a-b-4)
(x+1)²-4x²=(x+1+2x)(x+1-2x)=(3x+1)(1-x)
4m(m-n)+4n(n...

全部展开

81a²-16b²=(9a+4b)(9a-4b)
a²+b²-2ab-4a+4b=( a²+b²-2ab)-(4a-4b)=(a-b)²-4(a-b)=(a-b)(a-b-4)
(x+1)²-4x²=(x+1+2x)(x+1-2x)=(3x+1)(1-x)
4m(m-n)+4n(n-m)= 4m(m-n)-4n(m-n)=4(m-n)²
(a²+9b²)²-36a²b²=(a²+9b²+6ab)(a²+9b²-6ab)=(a+3b)²(a-3b)²

收起