Odpowiedzi

2009-09-13T14:54:32+02:00
A) a5×b7×c×a9×b12×c15×abc=a15*b20*c17
b) x5×(-y)3×x7×x4×(-y)10×(-y)=x16*(-y)14
c) (n10÷n7)×(n12÷n8)÷(n15÷n9)=n
d) a20÷[a15×(a13÷a9)÷(a2×a12)]=a15