Question

(X+9/11)(x-25/31) = 0

Answer 1

Vì \(\left(x+\frac{9}{11}\right)\left(x-\frac{25}{31}=0\right)\)

\(\Rightarrow\orbr{\begin{cases}x+\frac{9}{11}=0\\x-\frac{25}{31}=0\end{cases}\Rightarrow\orbr{\begin{cases}x=-\frac{9}{11}\\x=\frac{25}{31}\end{cases}}}\)

Vậy :\(\orbr{\begin{cases}x=-\frac{9}{11}\\x=\frac{25}{31}\end{cases}}\)

Answer 2

Do (x+9/11)(x-25/31) = 0

=> x+9/11 = 0 hoặc x-25/31 = 0

+) Nếu x + 9/11 = 0 => x = 0 - 9/11 => x = -9/11

+) Nếu x - 25/31 = 0 => x = 0 + 25/31 => x = 25/31

KL: x = -9/11 hoặc x= 25/31