Question

Thu gọn đa thức sau
Q= 7x²y - 2xy + 1/2x²y - xy + 11xy - 1/3x+ 1/3+2/3x- 1/6

Answer 1

\(Q=7x^2y-2xy+\dfrac{1}{2}x^2y-xy+11xy-\dfrac{1}{3}x+\dfrac{1}{3}+\dfrac{2}{3}x-\dfrac{1}{6}\)

\(Q=\dfrac{15}{2}x^2y+8xy-x-\dfrac{1}{6}\)

Answer 2

Q = ( 7x\(^2\)y + \(\dfrac{1}{2}\)x\(^2\)y ) + ( -2xy - xy + 11xy ) +( -\(\dfrac{1}{3}\)x + \(\dfrac{2}{3}\)x ) + ( -\(\dfrac{1}{3}\) - \(\dfrac{1}{6}\) )

= \(\dfrac{15}{2}\)x\(^2\)y + 8xy + \(\dfrac{1}{3}\)x _ \(\dfrac{1}{2}\)