[6xy^2乘(-2xy)^2-24x^5y^6除(-2xy)^2]除(-3xy^2)^2,其中x=2,y=2003
问题描述:
[6xy^2乘(-2xy)^2-24x^5y^6除(-2xy)^2]除(-3xy^2)^2,其中x=2,y=2003
答
[6xy^2*(-2xy)^2-24x^5y^6/(-2xy)^2]/(-3xy^2)^2=[6xy^2*4x^2y^2-24x^5y^6/(4x^2y^2)]/(9x^2y^4)=(24x^3y^4-6x^3y^4)/(9x^2y^4)=(18x^3y^4)/(9x^2y^4)=2x因为x=2所以原式=2x=4