Question

Produsul numerelor intregi 2·x-1,4·x+1 si 5-x este 0.calculati suma acestora

Answer 1

(2x-1)(4x+1)(5-x)=0

acest produs este egal cu 0 daca

2x-1=0

2x=1

x=1/2

4x+1=0

4x= -1

x= -1/4

5-x=0

x=5

$\frac{1}{2} - \frac{1}{4} + 5 \\ \frac{4 + 2 + 40}{8} = \frac{46}{8} = \frac{23}{4}$