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

(5-b)2=±±b±b2

(a-4)2=±a2±a±

(5a-b)2=±*2±**b±b2

(a-4b)2=±a2±*a*+*2

(5-t)2=±±10t±t2

(5-t)*(5-t)=±±10t±t2

(t-5)*(5-t)=±t2±10t±

(9-z)*(9-z)=±±z±z2

(x-5)*(5-x)=±x2±x±

(9ax-bz)*(9ax-bz)=±*()2±**bz±(bz)2

(vt-5up)*(5up-vt)=±(vt)2±*vt*±*()2

(5-z)*(5-z)=±±z±z2

(5-x)*(x-5)=±x2±x±

(5x-bz2)*(5x-bz2)=±*()2±**bz2±(bz2)2

(9dp-t)*(t-9dp)=±t2±*t*±*()2


×