(a+b)2=a2+2ab+b2

(8+b)2=+b+b2

(a+8)2=a2+a+

(8a+b)2=*2+**b+b2

(a+8b)2=a2+*a*+*2

(18+z)*(18+z)=+z+z2

(x+1)*(1+x)=x2+x+

(8ax+bz)*(8ax+bz)=*()2+**bz+(bz)2

(vt+1up)*(1up+vt)=(vt)2+*vt*+*()2

(1+z)*(1+z)=+z+z2

(x+18)*(18+x)=x2+x+

(1x+bz2)*(1x+bz2)=*()2+**bz2+(bz2)2

(t+18dp)*(18dp+t)=t2+*t*+*()2


×