Question

[-a^5.(-a^5)]+[a^2.(-a^2)]^5=0

 

Answer 1

\(\Leftrightarrow-a^{10}+a^{20}=0\)

=>a(a-1)(a+1)=0

hay \(a\in\left\{0;-1;1\right\}\)

Answer 2

`<=>(a^5. a^5)+[-(a^2. a^2)]^5=0`

`<=>a^10-a^20=0`

`<=>a^10(1-a^10)=0`

`<=>a^10=0` hoặc `1-a^10=0`

`<=>a=0` hoặc `a=1` hoặc `a=-1`