Question

Dada a função f(x)= x²-10x+15 calcule:
a) f(-1)
b)f(3)
c)f(0)
d)f(-2)

Answer 1

Dada a função f(x)= x²-10x+15 calcule: a)f (-1)
 b)f(3)
 c)f(0)
 d)f(-2)

a) f(-1)
f(x) = x² - 10x + 15
f(-1) = (-1)² - 10(-1) + 15
f(-1) = + 1 + 10 + 15
f(-1) = 26

b) f(3)
f(x) = x² - 10x + 15
f(3) = (3)³ - 10(3) + 15
f(3) = + 9 - 30 + 15
f(3) = 9 + 15 - 30
f(3) = 24 - 30
f(3) = - 6

c)f(0)
f(x) = x² - 10x + 15
f(0) = 0² - 10(0) + 15
f(0) = 0 - 0 + 15
f(0) = 15

d)f(-2)
f(x²) = x² - 10x + 15
f(-2) = (-2)² - 10(-2) + 15
f(-2) = + 4 + 20 + 15
f(-2) = 39