\(\left(xy+1\right)^2-\left(x-y\right)^2=\left(xy+1+x-y\right)\left(xy+1-x+y\right)\)
\(=x^2y^2+xy-x^2y+xy^2+xy+1-x+y+x^2y+x-x^2+xy-xy^2-y+xy-y^2\)
\(=x^2y^2+2xy-x^2-y^2+1\)
\(\left(xy+1\right)^2-\left(x-y\right)^2=\left(xy+1+x-y\right)\left(xy+1-x+y\right)\)
\(=x^2y^2+xy-x^2y+xy^2+xy+1-x+y+x^2y+x-x^2+xy-xy^2-y+xy-y^2\)
\(=x^2y^2+2xy-x^2-y^2+1\)
phan tich da thuc thanh nhan tu (x^2+xy)^2-(y^2+xy)^2
Ai giup minh voi a
Phan tich da thuc thanh nhan tu
(xy-1)^2 -x^2-y^2
Phan tich da thuc thanh nhan tu
A^5+a^3-a^2-1
27a^2b^2-18ab+3
4-x^2-2xy-y^2
Giup em voi lop8
phan tich da thuc sau thanh nhan tu ab(x^2+y^2)-xy(a^2+b^2)
phan tich da thuc sau thanh nhan tu
x^3+2x^2+x+2
giup minh nhe cam on nhieu
x^2-2007x-2008
Phan tich da thuc thanh nhan tu
giup minh nha
ab(a+b)+bc(b+c)+ca(c+a)+3abc phan tich da thuc thanh nhan tu cac ban vao giup minh vs vao trong tuong cua minh ai giup minh cho 2 like luon
phan tich da thuc thanh nhan tu
1+x+y+z+xy+yz+zx+xyz
phan tich da thuc thanh nhan tu
x^2-x-y^2-y
x^2-2xy+y^2-z^2
bai 32 va 33 sbt
lop 8 bai phan tich da thuc thanh nhan tu bang cach nhom hang tu