Question

Determine o valor de X, sabendo que: Ax,3 = 24 . Cx - 2,2

Answer 1

Ax,3 = 24 . C(x-2) ,2

x(x-1)(x-2) = 24. (x-2).(x-3)/2 => :(x-2)

x(x-1) = 12(x-3)

x²-x =12x-36

x² -13x +36 = 0

∆= (-13)² -4 1.36= 169 -144=25 => √∆=5

x' = -b+√∆/2a = 13+5/2 = 18/2= 9 ✓