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

(2-b)2=±±b±b2

(a-1)2=±a2±a±

(2a-b)2=±*2±**b±b2

(a-1b)2=±a2±*a*+*2

(2-t)2=±±4t±t2

(2-t)*(2-t)=±±4t±t2

(t-2)*(2-t)=±t2±4t±

(13-z)*(13-z)=±±z±z2

(x-2)*(2-x)=±x2±x±

(13ax-bz)*(13ax-bz)=±*()2±**bz±(bz)2

(vt-2up)*(2up-vt)=±(vt)2±*vt*±*()2

(2-z)*(2-z)=±±z±z2

(2-x)*(x-2)=±x2±x±

(2x-bz2)*(2x-bz2)=±*()2±**bz2±(bz2)2

(13dp-t)*(t-13dp)=±t2±*t*±*()2


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