问题标题:
几道数学填空题,急!在线等!(-x+4y+z)(-x+4y-z)=_______(3a-1)(_______)=1-6a+9a²(-x-y)·(x-y)=______4x²+9y²=(2x+3y)²-_______=(2x-3y)²+________.(x+1)²(x-1)²(x²+1)²=________(x+y)²·(x
问题描述:
几道数学填空题,急!在线等!
(-x+4y+z)(-x+4y-z)=_______
(3a-1)(_______)=1-6a+9a²
(-x-y)·(x-y)=______
4x²+9y²=(2x+3y)²-_______=(2x-3y)²+________.
(x+1)²(x-1)²(x²+1)²=________
(x+y)²·(x²-2xy+y²)=_________
罗安回答:
(-x+4y+z)(-x+4y-z)=___x²-8xy+16y²-z²____(3a-1)(__3a-1_____)=1-6a+9a²(-x-y)·(x-y)=-x²-2xy-y²______4x²+9y²=(2x+3y)²-__12xy_____=(...
点击显示
数学推荐
热门数学推荐