[(x+y)³]²[(x+y)³]的四次方-2[(x+y)的六次方]³=?

[(x+y)³]²[(x+y)³]的四次方-2[(x+y)的六次方]³=?
[(x+y)³]²[(x+y)³]的四次方-2[(x+y)的六次方]³=?

[(x+y)³]²[(x+y)³]的四次方-2[(x+y)的六次方]³=?

[(x+y)³]²[(x+y)³]的四次方-2[(x+y)的六次方]³
=(x+y)^6*(x+y)^12-2(x+y)^18
=(x+y)^18-2(x+y)^18
=-(x+y)^18

俊狼猎英团队为您

用字母M代替X+Y,
原式=(M^3)^2［M^3］^4-2［M^6］^3
=M^6*M^12-2M^18
=M^18-2*M^18
=-M^18
=-(X+Y)^18