因式分解8xy-x²-16y²-16y² 3x-12x³ 81-18(a+4)+(a+4)² a²-1-b²-2ab

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/04 01:30:17
因式分解8xy-x²-16y²-16y² 3x-12x³ 81-18(a+4)+(a+4)² a²-1-b²-2ab
x){:{=O;^,_lQQ[lhnakhVR054+V05x#QDSB Uӫe%&$>;Yӊg>Ɏ^ iqE3r@S f`uX.P.P^*pP#BMI%50ÍB(~h0056I 7DPHRUHY+ `h@%$FB”NQI6yvXsa/W<8鞆0Mbvl2AN _$

因式分解8xy-x²-16y²-16y² 3x-12x³ 81-18(a+4)+(a+4)² a²-1-b²-2ab
因式分解8xy-x²-16y²-16y² 3x-12x³ 81-18(a+4)+(a+4)² a²-1-b²-2ab

因式分解8xy-x²-16y²-16y² 3x-12x³ 81-18(a+4)+(a+4)² a²-1-b²-2ab
您这是不是4道题?
(1)8xy-x²-16y²
=-(-8xy+x²+16y² )
=-(x-4y)²
(2)3x-12x³
=3x(1-4x²)
=3x(1+2x)(1-2x)
(3)81-18(a+4)+(a+4)²
=(a+4-9)²
=(a-5)²
(4)a²+1-b²-2a
=a²+1-2a-b²
=(a-1)²-b²
=(a-1+b)(a-1-b)

(1)8xy-x²-16y²
=-(-8xy+x²+16y² )
=-(x-4y)²
(2)3x-12x³
=3x(1-4x²)
=3x(1+2x)(1-2x)
(3)81-18(a+4)+(a+4)²
=(a+4-9)²
=(a-5)...

全部展开

(1)8xy-x²-16y²
=-(-8xy+x²+16y² )
=-(x-4y)²
(2)3x-12x³
=3x(1-4x²)
=3x(1+2x)(1-2x)
(3)81-18(a+4)+(a+4)²
=(a+4-9)²
=(a-5)²
(4)a²+1-b²-2a
=a²+1-2a-b²
=(a-1)²-b²
=(a-1+b)(a-1-b)

收起

8xy-x²-16y²
=-(-8xy+x²+16y² )
=-(x-4y)²
(2)3x-12x³
=3x(1-4x²)
=3x(1+2x)(1-2x)
(3)81-18(a+4)+(a+4)²
=(a+4-9)²
=(a-5)²
(4)a²+1-b²-2a
=a²+1-2a-b²
=(a-1)²-b²
=(a-1+b)(a-1-b)