Question

Cx,2= 190 calculo matemático ​

Answer 1

Cx,2= 190

x.(x-1)/2! = 190

x.(x-1)/2 = 190

x² -x -380= 0

∆= 1 +1520= 1521 => √∆=39

x' = -b+√∆/2a = 1+39/2= 40/2 = 20 ✓