Question

determine as raízes 7x²+ 13x-2=0 ​

Answer 1

resposta

7x²+ 13x-2=0

¤= b²-4.a.c

¤= 13²-4.7.-2

¤=169+56

¤=225

x= -b+_V225/2.7

x= -13+_15/14

x'= -13+15/14

x'= 2/14

x"= 1/7

x"= -13-15/14

x"= -28/14

x"= -2

(1/7, -2)