Đáp án:
$\\$
`1,`
`(2x^2y) . (-3xyz^2) . (5 x^2y^2z^2)^2`
`= 2x^2y . (-3xyz^2) . 5^2 (x^2)^2 (y^2)^2 (z^2)^2`
`= 2x^2y . (-3xyz^2) . 25 x^4y^4z^4`
`= (-3.2.25) (x^2 . x.x^4) (y.y.y^4) (z^2 . z^4)`
`=-150 x^7 y^6 z^6`
`2,`
`(3x^3y^2z)^2 . (xyz^2) . (-7 xy^2z)^3`
`= 3^2 (x^3)^2 (y^2)^2z^2 . xyz^2 . (-7)^3 x^3 (y^2)^3 z^3`
`= 9 x^6 y^4z^2 . xyz^2 . (-343) x^3y^6z^3`
`= (-343 . 9) (x^6 . x . x^3) (y^4 . y . y^6) (z^2 . z^2 . z^3)`
`= -3087 x^{10} y^{11} z^{7}`
