Question

x²+3/2x-1, știind că x=-2​

Answer 1

Răspuns:

$\frac{x {}^{2} + 3}{2x - 1} = > x = -2 \\ \frac{-2 {}^{2} + 3 }{2 \times (-2) - 1} = \frac{-4 + 3}{-4 - 1} = \frac{-1}{-5} => \frac{1}{5}$