Odpowiedź:
a. 2(a-3b)-3(a-b)-5(4a+3b)=
=2a-6b-3a+3b-20a-15b=-21a-18b
b. -3(2x-3y)+5(x+2y)-2(3y-x)=
=-6x+9y+5x+10y-6y+2x=x+13y
c. 5(b-2a)+3(a-3b)-4(2a-4b)=
=5b-10a+3a-9b-8a+16b=-15a+12b
d. -7(2a+3b)-9(a-2b)-3(3a+4b)=
=-14a-21b-9a+18b-9a-12b=-32a-15b
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Odpowiedź:
a. 2(a-3b)-3(a-b)-5(4a+3b)=
=2a-6b-3a+3b-20a-15b=-21a-18b
b. -3(2x-3y)+5(x+2y)-2(3y-x)=
=-6x+9y+5x+10y-6y+2x=x+13y
c. 5(b-2a)+3(a-3b)-4(2a-4b)=
=5b-10a+3a-9b-8a+16b=-15a+12b
d. -7(2a+3b)-9(a-2b)-3(3a+4b)=
=-14a-21b-9a+18b-9a-12b=-32a-15b