怎么因式分解：（y+1)(y-1)(y+3)(y+5)+15

来源：学生作业帮助网编辑：作业帮时间：2024/11/18 00:34:00

怎么因式分解：（y+1)(y-1)(y+3)(y+5)+15
怎么因式分解：（y+1)(y-1)(y+3)(y+5)+15

怎么因式分解：（y+1)(y-1)(y+3)(y+5)+15
（y+1)(y-1)(y+3)(y+5)+15
=(y-1)(y+5)(y+1)(y+3)+15
=(y^2+4y-5)(y^2+4y+3)+15 把y^2+4y看做一个整体
=(y^2+4y)^2-2(y^2+4y)-15+15
=(y^2+4y)(y^2+4y-2)
=y(y+4)(y^2+4y-2)
有问题追问.

怎么因式分解XY-1+X-Y x²-y²-2y-1因式分解怎么做? x^2-y^2+2y-1因式分解怎么做（x+y）(x-1)-xy-y^2 怎么因式分解? 怎么因式分解：（y+1)(y-1)(y+3)(y+5)+15 因式分解:x2(y-1)-(y-1) 因式分解：（1+x+y)(1-x-y) 1+6y+9y^2 因式分解因式分解y^4-2y^2+1 8y^3-4y+1因式分解（x+y)(x+y-1)-12因式分解因式分解:(x+y)-4(x+y-1) (Y+1)(Y+3)-15因式分解, 因式分解(xy-1)²+(x+y-2)(x+y-2y)怎么做哇? 因式分解xy-x-y+1 xy+x+y+1因式分解 1-x-y+xy 因式分解因式分解:xy+x+y+1