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

(1-b)2=±±b±b2

(a-4)2=±a2±a±

(1a-b)2=±*2±**b±b2

(a-4b)2=±a2±*a*+*2

(1-t)2=±±2t±t2

(1-t)*(1-t)=±±2t±t2

(t-1)*(1-t)=±t2±2t±

(1-z)*(1-z)=±±z±z2

(x-2)*(2-x)=±x2±x±

(1ax-bz)*(1ax-bz)=±*()2±**bz±(bz)2

(vt-2up)*(2up-vt)=±(vt)2±*vt*±*()2

(2-z)*(2-z)=±±z±z2

(1-x)*(x-1)=±x2±x±

(2x-bz2)*(2x-bz2)=±*()2±**bz2±(bz2)2

(1dp-t)*(t-1dp)=±t2±*t*±*()2


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