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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
题目详情
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)=_________
(-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)=_________
▼优质解答
答案和解析
(-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_____=(2x-3y)²+__12xy______.
(x+1)²(x-1)²(x²+1)²=_x^8-2x^4+1_______
(x+y)²·(x²-2xy+y²)=__x^4-2x²y²+y_^4______
(3a-1)(__3a-1_____)=1-6a+9a²
(-x-y)·(x-y)=-x²-2xy-y²______
4x²+9y²=(2x+3y)² - __12xy_____=(2x-3y)²+__12xy______.
(x+1)²(x-1)²(x²+1)²=_x^8-2x^4+1_______
(x+y)²·(x²-2xy+y²)=__x^4-2x²y²+y_^4______
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