Question

Ax,3=42 (x-2) qual a resposta pfv

Answer 1

Ax,3=42 (x-2)

x(x-1)(x-2) = 42 (x-2)

x(x-1) = 42

x² -x -42 = 0

∆= (-1)² -4.1.(-42)=1+168=169 => √∆=13

x' = -b+√∆/2a = 1+13/2= 14/2 = 7 ✓