(х+2)² (2a+3b)² (5x-7)² (4a-b)² (m+4)² (3m+2n)² (7m-2)² (8m-n)² (a+9)² (3x+y)² (4a-9)² (5x-3y)²
X² + 4+4 4a² +12ab+9b² 25x²-70x+49 16a²-8ab+b² m² + 4m+16 9m²+12mn+4n² 49m²-24m+4 64m²-19mn+in a² +18a+81 9x²+6xy+a 16a²-72a+81 25x²-30xy+9y²
=x2+4x+4 =4a2+12ab+9b2 =25x2-70x-49 =16a2-8ab-b =m2+8m+16 =9m2+12nm+4n2 =49m2-28m-4 =64m2-16nm-n2 =a2+18a+81 =9x2+6xy+y2 =16a2-72a-81 =25x2-30xy-9y2