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

(5-b)2=±±b±b2

(a-7)2=±a2±a±

(5a-b)2=±*2±**b±b2

(a-7b)2=±a2±*a*+*2

(5-t)2=±±10t±t2

(5-t)*(5-t)=±±10t±t2

(t-5)*(5-t)=±t2±10t±

(4-z)*(4-z)=±±z±z2

(x-3)*(3-x)=±x2±x±

(4ax-bz)*(4ax-bz)=±*()2±**bz±(bz)2

(vt-3up)*(3up-vt)=±(vt)2±*vt*±*()2

(3-z)*(3-z)=±±z±z2

(5-x)*(x-5)=±x2±x±

(3x-bz2)*(3x-bz2)=±*()2±**bz2±(bz2)2

(4dp-t)*(t-4dp)=±t2±*t*±*()2


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