Toán Lớp 8: Tìm x :
x^2- 8x + 16 = 3x.(x – 4)
(x^2– 2x)^2–x^2+ 2x – 6 = 0
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: Tìm x :
x^2- 8x + 16 = 3x.(x – 4)
(x^2– 2x)^2–x^2+ 2x – 6 = 0
Comments ( 2 )
a) x^2 -2.4x +4^2 = 3x(x-4)
(x-4)^2 – 3x(x-4)=0
(x-4)(x-4-3x)=0
(x-4)(-2x-4)=0
+) x-4=0 +) -2x-4=0
x= 4 x= -2
Vậy……..
b) đề là x hay x^2 vậy =((