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.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: √7-5 + √4t-20 – 1/5*√9t-45 =3 giúp mình với ạ

Toán Lớp 9: √7-5 + √4t-20 – 1/5*√9t-45 =3
giúp mình với ạ

Comments ( 1 )

  1. \sqrt{t-5}+\sqrt{4t-20}-1/5\sqrt{9t-45}=3(t>=5) \text{Sửa đề chút nhé}
    <=>\sqrt{t-5}+2\sqrt{t-5}-1/5 .3\sqrt{t-5}=3
    <=>\sqrt{t-5}(1+2-3/2)=3
    <=>3/2\sqrt{t-5}=3
    <=>\sqrt{t-5}=2
    <=>t-5=4
    <=>t=9(tm)
    Vậy S={9}
     

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Kim Xuân