1. -13ab+ba-8ab
2. 42xy^2*(1/2)^2xy
3. 80xy^2/-44x^3yz
4. (-15x^2y^3-10x^3y^3+6xy)* 5xy
5. (3x-2)^2
1. -13ab+ba-8ab 2. 42xy^2*(1/2)^2xy 3. 80xy^2/-44x^3yz 4. (-15x^2y^3-10x^3y^3+6xy)* 5xy 5. (3x-2)^2
By Gabriella
By Gabriella
1. -13ab+ba-8ab
2. 42xy^2*(1/2)^2xy
3. 80xy^2/-44x^3yz
4. (-15x^2y^3-10x^3y^3+6xy)* 5xy
5. (3x-2)^2
Đáp án:
Giải thích các bước giải:
$1/-13ab+ba-8ab \\=ab(-13+1-8) \\=ab.(-20) \\2/42xy^2.\bigg(\dfrac{1}{2}\bigg)^2xy \\=42xy^2.\dfrac{1}{4}.xy \\=\dfrac{21}{2}.x^2y^3 \\3/\dfrac{80xy^2}{-44x^3yz} \\=\dfrac{-20y}{x^2z} \\4/(-15x^2y^3-10x^3y^3+6xy).5xy \\=-75x^3y^4-50x^4y^4+30x^2y^2 \\5/(3x-2)^2\\=9x^2-12x+4$