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Va roggg!!!! Pe 3 si 4

Va Roggg Pe 3 Si 4 class=

Răspuns :

EX.3

a·b=11·5/6=(11·6)+5/6=66+5/6=71/6
a·c=8·5/12=(8·12)+5/12=96+5/12=101/12
a(b-c)=ab-ac=71/6-101/12
ab-ac=142/12-101/12=41/12

EX. 4

a·b=7·3/11=80/11
a·c=3·5/22=71/22
ad=4·13/33=145/33
a(b-c+d)=ab-ac+ad=80/11-71/22+145/33=67397/4536