(3+x) (2-x) = 14

Multiplicando..

6-3x+2x-x^2=-14

-x^2-x+6=-14 (-1)

x^2+x-6=14

x^2+x=20

x(x+1)=20

x= 20. Ou. x+1=20

x=19

Espero q eu esteja certo, so quis ajudar..

(3+x) (2-x) =-14.......6-3x+2x-x²=-14........

-x²-x+6+14=0.....-x²-x +20=0.....x²+x-20=0

resolvendo temos x1= -5 e x2= 4

3.2+3(-x)+2.x-x²=-14

6-3x+2x-x²=

-x²-x+6