Toán Lớp 8: tìm x bik
( x – 4 )( x mũ 2 + 4x + 16 ) – x (x mũ 2 – 6) = 2
cần gấp
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 bik
( x – 4 )( x mũ 2 + 4x + 16 ) – x (x mũ 2 – 6) = 2
cần gấp
Comments ( 2 )
<=>(x-4)(x^2+4x+4^2)-x(x^2-6)=2
<=>x^3-4^3-x^3+6x=2
<=>x^3-64-x^3+6x=2
<=>6x-64=2
<=>6x=2+64
<=>6x=66
<=>x=66:6
<=>x=11
Vậy phương trình có nghiệm S={11}