Question

Dada a função f: R → R definida por f(x) = x² - 3x- 10, calcule:

a) f ( -2 ) b) f ( -1 ) c) f ( 0 ) d) f ( 3 ) e) f ( 5 ) f) f

Answer 1

 f(x) = x²-3x-10

a) f(-2) = (-2)²-3(-2)-10 = 4+6-10= 10-10= 0
b) f(-1) = (-1)²-3(-1)-10 = 1+3-10 = 4-10 = -6
c) f(0) = 0²-3(0)-10 = 0-0-10 = -10
d) f(3) = 3²-3(3)-10 = 9-9-10 = 0-10 = -10
e) f(5) = 5²-3(5)-10 = 25-15-10 = 10-10 = 0