Toán Lớp 9: Căn 2x + 5 – căn 3x – 5 = 2
GIÚP MÌNH VỚI MN PLS
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 9: Căn 2x + 5 – căn 3x – 5 = 2
GIÚP MÌNH VỚI MN PLS
Comments ( 2 )
⇔ 2x+5=4+3x-5+4\sqrt{3x-5}
⇔ 6-x=4\sqrt{3x-5}
⇔ 36-12x+x^2=16(3x-5)
⇔ x^2-12x+36=48x-80
⇔ x^2-60x+116=0
⇔ x^2-58x-2x+116=0
⇔ x(x-58)-2(x-58)=0
⇔ (x-2)(x-58)=0
⇔ x=2;58