Respostas

  • Usuário do Brainly
2013-09-10T00:46:12-03:00
2013-09-10T00:51:10-03:00
Delta:(13)² - 4(7)(-2)=169 + 56 =225
x'= (-13+ raiz de 225)/14= (-13+15)/14=1/7
x"= (-13- raiz de 225)/14=( -13 - 15)/14= -2