(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