Question

Daca 4a la a 2-a + 9b la a 2-a =12ab,atunci a/b =...

Answer 1

[tex]4 a^{2} +9 b^{2} = 12ab \rightarrow (2a)^{2} - 2*2a*3b+(3b)^{2}= 0 \rightarrow(2a-3b)^{2}= 0 \\ 2a-3b=0 \rightarrow 2a=3b \rightarrow \frac{a}{b}= \frac{3}{2} [/tex]