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

(4+b)2=+b+b2

(a+6)2=a2+a+

(6a+b)2=*2+**b+b2

(a+4b)2=a2+*a*+*2

(10+z)*(10+z)=+z+z2

(x+7)*(7+x)=x2+x+

(6ax+bz)*(6ax+bz)=*()2+**bz+(bz)2

(vt+7up)*(7up+vt)=(vt)2+*vt*+*()2

(7+z)*(7+z)=+z+z2

(x+10)*(10+x)=x2+x+

(7x+bz2)*(7x+bz2)=*()2+**bz2+(bz2)2

(t+10dp)*(10dp+t)=t2+*t*+*()2


×