Question

dada a funcao f(x)=x2-5x+4 calcule a f(0) b f(-1) c f(4) d f(-2)

Answer 1

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Resolução :

f ( X ) = X² - 5X + 4
__________________

f ( 0 ) = 0² - 5 ( 0 ) + 4

f ( 0 ) = 0 - 0 + 4

f ( 0 ) = 0 + 4

f ( 0 ) = 4
___________________

f ( - 1 ) = - 1² - 5 ( - 1 ) + 4

f ( - 1 ) = - 1 - 5 + 4

f ( - 1 ) = - 1 + 9

f ( - 1 ) = 8
___________________

f ( 4 ) = 4² - 5 ( 4 ) + 4

f ( 4 ) = 16 - 20 + 4

f ( 4 ) = - 4 + 4

f ( 4 ) = 0
___________________

f ( - 2 ) = - 2² - 5 ( - 2 ) + 4

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

f ( - 2 ) = 6 + 4

f ( - 2 ) = 10