32.4
1) a²+2a+1 = (a+1)²
2) b²-8b+16 = (b-4)²
3) c²+10c+25 = (c+5)²
4) n²+14n+49 = (n+7)²
5) 100-20z+z² = (10-z)²
6) 81+18b+b² = (9+b)²
32.5
1) 0,16-0,8t+t² = 0,04(2-5t)²
2) z²+1,4z+0,49 = 0,01(10z+7)²
3) 0,36-1,2b+b² = 0,04(3-5b)²
4) 2,25-3x+x² = 0,25(3-2x)²
5) y²-3,2y+2,56 = 0,04(5y-8)²
6) 3,61+3,8d+d² = 0,01(19+10d)²