Question

7/2=(x+1)*x/12
Calcular o resultado da equação ​

Answer 1

7/2=(x+1)*x/12 ===> *(2)

2.7/2 = (x+1).x.2/12

7 = (X+1).x/6

x² +x -42 = 0

∆= 1 +169 = 169 => √∆ = 13

x = -b±√∆/2a

x = -1±13/2

x' = 12/2 = 6 ✓

x" = -14/2= -7 ✓