1) (a+c)^2 = a^2 + 2ac + c^22) (11-y)^2 = 121 - 22y + y^23) (10+4c)^2 = 100 + 80c + 16c^24) (-3c+a)^2 = 9c^2 - 6ac + a^25) (a^2+b^2)^2 = a^4 + 2a^2b^2 + b^4
1) (a+c)^2 = a^2 + 2ac + c^2
2) (11-y)^2 = 121 - 22y + y^2
3) (10+4c)^2 = 100 + 80c + 16c^2
4) (-3c+a)^2 = 9c^2 - 6ac + a^2
5) (a^2+b^2)^2 = a^4 + 2a^2b^2 + b^4