Question

Giá tri x < 0 Thoả mãn x^2= 2^4

Answer 1

x < 0 

\(-x^2=2^4=-x^2=16\Rightarrow x=-4\)

Answer 2

\(x^2=2^4\)

\(\Rightarrow x^2=16\)

\(\Rightarrow x^2=4^2\)

\(\Rightarrow x=4;-4\)

Vì x<0  => x=-4

tíc mình nha

Answer 3

\(-x^2=16\Rightarrow x=-4\)

\(-4^2=16\)