早教吧作业答案频道 -->数学-->
(y^2-1)(y+3)(y+5)+15分解因式
题目详情
(y^2-1)(y+3)(y+5)+15分解因式
▼优质解答
答案和解析
(y^2-1)(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
=(y^2+4y)^2-2(y^2+4y)
=(y^2+4y)(y^2+4y-2)
=y(y+4)(y^2+4y-2)
=(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
=(y^2+4y)^2-2(y^2+4y)
=(y^2+4y)(y^2+4y-2)
=y(y+4)(y^2+4y-2)
看了(y^2-1)(y+3)(y+...的网友还看了以下:
a(a+b)(a-b)+b(b+a)(b-a)各项的公因式是4x的m+1次方-6x的m次方-2x的 2020-04-08 …
(高分)解一条数学题里的一步,我看不明白是什么,请指出实数x,y和z满足x+y+z=5,xy+yz 2020-05-16 …
因式分解5(x²-y²)²-1/5x²y²因式分解5(x²-y²)²-1/5x²y² 2020-05-22 …
已知x^5+y^5=(x+y)(x^4-x^3y+x^2y^2-xy^3+y^4)和x^2-y^2 2020-06-12 …
因式分解:①(x+y)^5-x^5-y^5②(x+y)^4-x^4-y^4因式分解:①(x+y)^ 2020-07-29 …
an=2的n次方减1分之一证明它的前n项和小于3分之5,因为这题太经典了 2020-07-29 …
9a^4-25a^2b^2+16b^4二次三项式的因式分解PS:1.(x^2-2x-5)(x^2- 2020-08-02 …
下列各题因式分解正确的是()A.(x-y)∧2+10(y-x)+25=(x-y+5)∧2B.(x- 2020-08-03 …
先分解因式,再计算求值.已知x+y=5,xy=6,求x(x+y)(x-y)-x(x+y)^2的值.先 2020-11-01 …
一个因式分解题目轮换法做因式分解(x+y+z)^5-(y+z-x)^5-(z+x-y)^5-(x+y 2020-11-01 …