Question

Помогите пж! Ничего не понимаю! ​

Answer 1

(2a-2b)²/(a-b)= (2(a-b))²/(a-b)= 4(a-b)²/(a-b)= 4(a-b)= 4a-4b

(3c+9d)²/(c+3d)= (3(c+3d))²/(c+3d)= 9(c+3d)²/(c+3d)= 9(c+3d)= 9c+27d