Question

Решите:
1)(a/a+1+a/a-1)^2
2)(а-а/а+1)^2

Answer 1

1.$(1+1+ frac{a}{a} -1)^2=(2+ frac{a}{a} -1)^2=(2+1-1)^2=(3-1)^2=2^2=4$
2. $(a-1+1)^2=a^2$