1) (12a-2)² = [tex]\left(12a\right)^2-2\cdot \:12a\cdot \:2+2^2[/tex]= [tex]144a^2-48a+4[/tex]
2) (6m+8)² = [tex]\left(6m\right)^2+2\cdot \:6m\cdot \:8+8^2[/tex] = [tex]36m^2+96m+64[/tex]
3) (3b+4)² = [tex]\left(3b\right)^2+2\cdot \:3b\cdot \:4+4^2[/tex] = [tex]9b^2+24b+16[/tex]
4) (4w-5)² = [tex]\left(4w\right)^2-2\cdot \:4w\cdot \:5+5^2[/tex] = [tex]16w^2-40w+25[/tex]
