1(-7x^2y)(2x^2y-3xy^3+xy) 2.(x^4y+6x^3y^2-x^2y^3)/(3x^2y) 3.(2m+n-p)(2m-n+p)
问题描述:
1(-7x^2y)(2x^2y-3xy^3+xy) 2.(x^4y+6x^3y^2-x^2y^3)/(3x^2y) 3.(2m+n-p)(2m-n+p)
(-5x+3/2)(-5x-1.5)
答
1(-7x^2y)(2x^2y-3xy^3+xy)=-14x^4y^2+21x^3y^4-7x^3y^2 2.(x^4y+6x^3y^2-x^2y^3)/(3x^2y) =1/3x^2+2xy-1/3y^23.(2m+n-p)(2m-n+p)=(2m+n-p)(2m-(n-p))=4m^2-(n-p)^2=4m^2-n^2+2np-p^2(-5x+3/2)(-5x-1.5...