А) а² - 2а +1 = (а - 1)²
б) х² +6х + 9 = (х +3)²
в) m² +8m +16 = (m+4)²
г) у² +10у +25 = (у +5)²
д) 9 - 6n +n² = (3 - n)²
e) 16 +8ab +b² = (4 + b)²
=(3*a+4)*(3*a+4)=3*a*3*a+3*a*4+3*a*4+4*4=9*a²+24*a+16. Ответ: 9*a²+24*a+16.
1) 11^7*2^12=11*2^(7+12)=22^19
2)22^19:22^7= 22^(19-7)=22^12
(-0,6)*(0,0081^1/2 + (1.1/9)^-2) : 1.5/13 = (-0,6)*(0,09+ (10/9)^-2) : 18/13=
= (-0,6)*(0,09 + (81/100) : 18/13=
-0,6*0,9:18/13 =-(6*9*13)/(100*18)=
=-3*13/100=-0,39