Упростите: 1) (2а^2b-10b^3)-(4a^2b^3)=

2) (3xy^2+7x^2y)-(2xy^2-6x^2y)=

3)(10abc-8bcx-21cxy)-(-6abc+bcx-cxy)=

4) (1/2х^2y^2-2/3ab-5/6a^2b-1)-(a^2b-1/3x^2y^2+1/12ab-1/4)=

1

Ответы и объяснения

2012-10-15T14:01:26+00:00

(2а^2b-10b^3)-(4a^2b^3)=((-4)a^2-1000)b^3+2a^2b

 

(3xy^2+7x^2y)-(2xy^2-6x^2y)=xy^2+13x^2y

 

(10abc-8bcx-21cxy)-(-6abc+bcx-cxy)=x((-20)cy-9bc)+16abc

 

(1/2х^2y^2-2/3ab-5/6a^2b-1)-(a^2b-1/3x^2y^2+1/12ab-1/4)=-(9ab-10x^2y^2+22a^2b+9)/12