Question

计算：（m+2n-p）2

计算：（m+2n-p）2．

Answer 1

原式=[（m+2n）-p]²，
=（m+2n）²-2p（m+2n）+p²，
=m²+4mn+4n²-2pm-4pn+p²．

Answer 2

原式=[（m+2n）-p]2，
=（m+2n）2-2p（m+2n）+p2，
=m2+4mn+4n2-2pm-4pn+p2．