#1
(13-7а)²= 169+49а²-182а
(1,6+9а)²= 2,56+81а²+28,8а
(2+0,1а)²= 4+0,01а²+0,4а
(4-3а)²=16+9а²-24а
#2
(0,1+18n)²= 0,01+ 324n²+3,6n
(8m³+1,3n³)²= 64m^6+1,69n^6+20,8m²n²
(m³-0,6n²)²= m^6+0,36n²-1,2m³n²
(3-10n)²=9+100n²-60n
(2m³-1,1n²)²= 2m^6+1,21n⁴-4,4m³n²
(9+1,1n)²=81+1,21n²+19,8n