2. làm tính nhân
a. (x^2-2xy+y^2)(x-y)
b.(5x^2y-2xy^2+y^2)(-x^-2x^2y+5xy^2)
giúp vs ạ mik cần gấp mong mọi ng giúp đỡ xin cảm ơn
2. làm tính nhân a. (x^2-2xy+y^2)(x-y) b.(5x^2y-2xy^2+y^2)(-x^-2x^2y+5xy^2) giúp vs ạ mik cần gấp mong mọi ng giúp đỡ xin cảm ơn
By Vivian
`a)(x²-2xy+y²)(x-y)`
`=x³-x²y-2x²y+2xy²+xy²-y³`
`=x³-3x²y+3xy²-y³`
`b)(5x²y-2xy²+y²)(-x³-2x²y+5xy²)`
`=-5x^5y-10x^4y²+25x³y³+2x^4y²+4x³y³-10x²y^4-x³y³-2x²y³+5xy^4`
`=-5x^5y-8x^4y²+29x³y³-10x²y^4+5xy^4-x³y²-2x²y³`
`#DyHungg`
`a) (x²-2xy+y²)(x-y)`
`=x³-x²y-2x²y+2xy²+xy²-y³`
`=x³-y³-3x²y+3xy²`
…………..
`b) (5x²y-2xy²+y²)(-x²-2x²y+5xy²)`
`=-5x^4y-10x^4y^2+25x³y³+2x³y²+4x³y³-10x²y^4-x²y²-2x²y³+5xy^4`
`=-5x^4y-10x^4y^2+29x³y³2x³y²-10x²y^4-x²y²+5xy^4`