Question

plz solve 13th main 3rd and 4th. ​

Answer 1

3)

log a - log b = log a / b. So, we have $\frac{x + 3}{x-3}=10 \implies x+3=10x-30 \implies x = \frac{11}{3}$.

4)

We have:

$x^2-21=10^2 \implies x^2=121 \implies x=11, -11$.