(x^2-9)x(x+3/7)=0 Giúp mik với mik cảm ơn 07/08/2021 Bởi Valentina (x^2-9)x(x+3/7)=0 Giúp mik với mik cảm ơn
`(x^2-9)×(x+3/7)=0` `=>` \(\left[ \begin{array}{l}x^2-9=0\\x+\frac{3}{7}=0\end{array} \right.\) `=>` \(\left[ \begin{array}{l}x^2= 9\\x=-\frac{3}{7}\end{array} \right.\) `=>` \(\left[ \begin{array}{l}x^2= 3^2\\x=-\frac{3}{7}\end{array} \right.\) `=>` \(\left[ \begin{array}{l}x=3\\x=-3\\x=-\frac{3}{7}\end{array} \right.\) (Chúc bạn học tốt) Bình luận
`(x^2-9)×(x+3/7)=0`
`=>` \(\left[ \begin{array}{l}x^2-9=0\\x+\frac{3}{7}=0\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}x^2= 9\\x=-\frac{3}{7}\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}x^2= 3^2\\x=-\frac{3}{7}\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}x=3\\x=-3\\x=-\frac{3}{7}\end{array} \right.\)
(Chúc bạn học tốt)
Đây.