①(-4xy^3)*(-1/8xy)-(1/2xy^2)^2 ②-2(-a^2bc)^2*1/2a(bc)^3-(-abc)^3*(-abc)^2
问题描述:
①(-4xy^3)*(-1/8xy)-(1/2xy^2)^2 ②-2(-a^2bc)^2*1/2a(bc)^3-(-abc)^3*(-abc)^2
答
原式=1/2x^2y^4-1/4x^2y^4
=1/4x^2y^4
原式=-2(a^4b^2c^2)*1/2ab^3c^3+(abc)^5
=-a^5b^5c^5+a^5b^5c^5
=0