Question

funçao f(x)=x o quadrado -5x+4 e determine f(4) F(-2 as raizes

Answer 1

Ola Figueire

f(x) = x² - 5x + 4

f(4) = 4² - 5*4 + 4 = 16 - 20 + 4 = 20 - 20 = 0

f(-2) = 5 + 10 + 4 = 19

as raízes

x² - 5x + 4 = 0

delta
d² = 25 - 16 = 9
d = 3

x1 = (5 + 3)/2 = 4
x2 = /5 - 3)/2 = 1

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