`Thu` `gọn` `:`
`P ( x ) = 3x - 2/3x^2 + x^3 + 2x + 4x^2 - 5/4`
`= ( 3x + 2x ) + ( - 2/3x^2 + 4x^2 ) + x^3 - 5/4`
`= 5x + 10/3x^2 + x^3 - 5/4`
`Tính`` P ( x ) - Q ( x )`
`P ( x ) = 5x + 10/3x^2 + x^3 - 5/4`
`-`
`Q ( x ) = 5x + 2/3x^2 - x^3 + 7`
`= 8/3x^2 + 2x^3 - 33/4`
`Tính` `P ( x ) + Q ( x )`
`P ( x ) = 5x + 10/3x^2 + x^3 - 5/4`
`+`
`Q ( x ) = 5x + 2/3x^2 - x^3 + 7`
`= 10x + 12/3x^2 + 23/4`
`HỌC` `TỐT` `NHA` `!`
`#NOCOPY`
