Question

phân tích

xy(x+y)+yz(y+z)+xz(x+z)+2xyz

Answer 1

xy(x+y) + yz(y+z) + xz(x+z) +2xyz

=xy(x+y) + yz(y+z) +xyz + xz(x+z) +xyz

= xy(x + y) + yz(y + z + x) + xz(x + z + y)

= xy(x + y) + z(x + y + z)(y + x)

= (x + y)(xy + zx + zy + z²)

= (x + y)[x(y + z) + z(y + z)]

= (x + y)(y + z)(z + x)

Answer 2

\(x^2y+xy^2+y^2z+yz^2+x^2z+xz^2\)

=\(x\left(xy+y^2\right)+y\left(yz+z^2\right)+x\left(xz+z^2\right)\)

Answer 3

ko tick cau tra loi cho nguoi ta mot lan a ?