Toán Lớp 8: (x-1)*(x-12)=(2x-3)*(5x-4) giúp em vs ạ
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 8: (x-1)*(x-12)=(2x-3)*(5x-4) giúp em vs ạ
Comments ( 2 )
<=>x^2-13x+12=10x^2-23x+12
<=>10x^2-x^2-23x+13x+12-12=0
<=>9x^2-10x=0
<=>x(9x-10)=0
<=>\(\left[ \begin{array}{l}x=\\9x-10=0\end{array} \right.\)
<=>\(\left[ \begin{array}{l}x=\\9x=10\end{array} \right.\)
<=>\(\left[ \begin{array}{l}x=0\\x=\dfrac{10}9\end{array} \right.\)
Vậy : Phương trình có tập nghiệm S={0; 10/9}