Respostas

  • Usuário do Brainly
2014-09-02T03:23:16-03:00
y=3x^2-2x+(m-4)

Se as raízes são duplas, \Delta=0:

(-2)^2-4\cdot3\cdot(m-4)=0

4-12(m-4)=0

4-12m+48=0

12m=52

m=\dfrac{52}{12}

m=\dfrac{13}{3}