Question

Cine stie exercitiul 2,este urgent

Answer 1

$\it \frac{a}{3} = \frac{4}{b} \Rightarrow a*b = 3*4 \Rightarrow a*b=12 \\ \\ a*b-12 = 12-12 = 0$

Answer 2

a/3=b/4
Produsul mezilor=produsul extremilor.
a*b=3*4
a*b=12
a*b-12=12-12=0