Question

simplificar cada expresión: A)3.(P-4)-(P_1) B)-5.(a-b)-7.(a-b)-(a-b) C)-7.[2x(x-1)+3x(x-3)-2x(x-3)]

Answer 1

A)

 P-4

-P+1

------

0-3

 

B)

-5(a-b)

-7(a-b)

-1(a-b)

---------

-13(a-b)

 

C)-7.[2x(x-1)+3x(x-3)-2x(x-3)]=-7.[2x(x-1)+x(x-3)]=-7x.[2(x-1)+(x-3)]
=-7x.[2x-2+x-3]=7x(3x-5)