Question

3x² - 2x/ 5x-1 para x= 3/4

Answer 1

$\frac{3x^2-2x}{5x-1}=$

$\frac{3( \frac{3}{4})^2-2( \frac{3}{4}) }{5( \frac{3}{4})-1 }=$

$\frac{3( \frac{9}{16})- \frac{6}{4} }{ \frac{15}{4}-1 }=$

$\frac{ \frac{27}{16}- \frac{6}{4} }{ \frac{11}{4} }=$

$\frac{ \frac{27-24}{16} }{ \frac{11}{4} }=$

$\frac{ \frac{3}{16} }{ \frac{11}{4} }= \frac{3}{16}: \frac{11}{4}=$

$\frac{3}{16}. \frac{4}{11}= \frac{3}{44}$