Question

1) determine o valor do discriminante delta (Δ)

a) x²-12x+5=0
b) x²-3x-4=0
c)x²-6x+16=0
d)x²-2x+1-0
e)x²-7x+15=0
f)9x²-6x+1=0

Answer 1

• assunto:  calculo do delta.

• formula do delta

d = b² - 4ac

a) d = 144 - 4*1*5 = 144 - 20 = 124

b) d = 9 - 4*1*(-4) = 9 + 16 = 25

c) d = 36 - 4*1*16 = 36 - 64 = -28

d) d = 4 - 4*1*1 = 4 - 4 = 0

e) d = 49 - 4*1*15 = 49 - 60 = -11

f) d = 36 - 4*9*1 = 36 - 36 = 0