Question

determine as razoes da esquacao -x²-8×-15=0​

Answer 1

delta--b'2-4•a•c
(-8)'2-4•(-1)•(-15)
64-60
=4

x'1= -(-8)+2
-----------= -5
2×(-1)

x'2= -(-8)- 2
---------- = -3
2×(-1)