Question

2) Determinando as raízes de
y=x2-x-12:
O a) 3 e-4
O b)-3 e 4
O c)-4 e 3
O d) 4 e -3​

Answer 1

x² -x -12 = 0. => b/c=-1/-12 = 3-4/3•-4

(x+3) . (x-4) = 0

x'=-3. x"=4

=============> b)-3 e 4