Question

Determine as raizes da equação do 2° grau x² - 5x + 4 = 0

Answer 1

x^2-5x+4=0
delta=b^2-4ac
delta=(-5)^2-4.1.4
delta=25-16
delta=9
x=-b-/+ raiz de delta/2a
x=-(-5)-3/2.1
x=5-3/2
x=2/2
x=1
x=-(-5)+3/2.1
x=5+3/2
x=8/2
x=4

Answer 2

x² - 5x + 4 = 0
Δ= b²-4 ac
Δ= (-5)² -4.1.4
Δ= 25 - 16
Δ= 9

x= -b +/- √Δ / 2a
x= -(-5) +/- √9 / 2.1
x= 5 +/- 3/ 2
x'= 5+3/2
x'= 8/2
x'= 4

x''= 5-3//2
x''= 2/2
x''=1

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