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

(7+b)2=+b+b2

(a+3)2=a2+a+

(3a+b)2=*2+**b+b2

(a+7b)2=a2+*a*+*2

(4+z)*(4+z)=+z+z2

(x+4)*(4+x)=x2+x+

(3ax+bz)*(3ax+bz)=*()2+**bz+(bz)2

(vt+4up)*(4up+vt)=(vt)2+*vt*+*()2

(4+z)*(4+z)=+z+z2

(x+4)*(4+x)=x2+x+

(4x+bz2)*(4x+bz2)=*()2+**bz2+(bz2)2

(t+4dp)*(4dp+t)=t2+*t*+*()2


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