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

(9-b)2=±±b±b2

(a-1)2=±a2±a±

(9a-b)2=±*2±**b±b2

(a-1b)2=±a2±*a*+*2

(9-t)2=±±18t±t2

(9-t)*(9-t)=±±18t±t2

(t-9)*(9-t)=±t2±18t±

(8-z)*(8-z)=±±z±z2

(x-2)*(2-x)=±x2±x±

(8ax-bz)*(8ax-bz)=±*()2±**bz±(bz)2

(vt-2up)*(2up-vt)=±(vt)2±*vt*±*()2

(2-z)*(2-z)=±±z±z2

(9-x)*(x-9)=±x2±x±

(2x-bz2)*(2x-bz2)=±*()2±**bz2±(bz2)2

(8dp-t)*(t-8dp)=±t2±*t*±*()2


×