Toán Lớp 8: a x^4+x^3+x^2+3x^2
b x^2.(x+2)
c(x-2y)(3xy+6y^2+x)
Phân tích phần nhân tử.
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: a x^4+x^3+x^2+3x^2
b x^2.(x+2)
c(x-2y)(3xy+6y^2+x)
Phân tích phần nhân tử.
Comments ( 1 )
a){x^4} + {x^3} + {x^2} + 3{x^2}\\
= {x^4} + {x^3} + 4{x^2}\\
= {x^2}\left( {{x^2} + x + 4} \right)\\
b){x^2}\left( {x + 2} \right)\\
= {x^3} + 2{x^2}\\
c)\left( {x – 2y} \right)\left( {3xy + 6{y^2} + x} \right)\\
= 3{x^2}y + 6x{y^2} + {x^2} – 6x{y^2} – 12{y^3} – 2xy\\
= 3{x^2}y + {x^2} – 12{y^3} – 2xy
\end{array}$