rut gon bieu thuc

B=  \(\frac{x^3-y^3-z^3-3xyz}{\left(x+y\right)^2+\left(y-z\right)^2+\left(x+z\right)^2}\)

rut gon bieu thuc

\(Q=\left(x-y\right)^3+\left(y+x\right)^3+\left(y-x\right)^3-3xy\left(x+y\right)\)

\(P=12\left(5^2+1\right).\left(5^4+1\right).\left(5^8+1\right).\left(5^{16}+1\right)\)

Cho bieu thuc

\(P=\frac{x^2}{\left(x+y\right)\left(1-y\right)}-\frac{y^2}{\left(x+y\right)\left(x+1\right)}-\frac{x^2y^2}{\left(x+1\right)\left(1-y\right)}\)

Rut gon P= x+xy-y

DKXD \(x\ne y\);   \(x\ne-1\):\(y\ne1\)

Tim x y de P nguyen duong thoa man \(x^2+y^2+3xy-x-3y=0\)

rut gon bieu thuc:

a,\(x\left[x-y\right]+y\left[x-y\right]\)

b,\(x^{n-1}\left[x+y\right]-y\left[x^{n-1}+y^{n-1}\right]\)

rut gon bieu thuc :

\(\left(x+1\right)^4-6\left(x+1\right)^2-\left(x^2-2\right).\left(x^2+2\right)\)

RUT GON BIEU THUC:

\(A=3x^{n-2}\left(x^{n+2}-y^{n+2}\right)+y^{n+2}\left(3x^{n-2}-y^{n-2}\right)\)

\(B=x^{10}-7x^9+7x^8-7x^7+...+7x^2-7x+2\)

\(2\times\left(x-y\right)\times\left(x+y\right)+\left(x+y\right)^2+\left(x-y\right)\)

Rut gon

rut gon phan thuc:

a, \(\frac{10x}{5x^2}\)

b,\(\frac{x\left(x^2-y^2\right)}{x^2\left(x+y\right)}\)

Rut gon bieu thuc

A=(x+1)\(\left(x^2+1\right)\left(x^4+1\right)...\left(x^{256}+1\right)+1\)