1) 0,16t^2−(t+p)^2 = 0,16t^2−(t^2+2tp+p^2) = 0,16t^2−t^2−2tp−p^2 = (0,16−1)t^2−2tp−p^2 = -0,84t^2−2tp−p^2
2) 0,25x−xu^2 = x(0,25−u^2) = x(0,5u+0,5)(0,5u−0,5)
3) 0,2z^2−0,4zy+0,2y^2 = 0,2(z^2−2zy+y^2) = 0,2(z-y)^2
1) 0,16t^2−(t+p)^2 = 0,16t^2−(t^2+2tp+p^2) = 0,16t^2−t^2−2tp−p^2 = (0,16−1)t^2−2tp−p^2 = -0,84t^2−2tp−p^2
2) 0,25x−xu^2 = x(0,25−u^2) = x(0,5u+0,5)(0,5u−0,5)
3) 0,2z^2−0,4zy+0,2y^2 = 0,2(z^2−2zy+y^2) = 0,2(z-y)^2