Question

dadas as funções f(x) = 2x² -6x-4 e g(x)= -3x² -5+1 calcule

a) f(3)
b) f(-2)
c) f(0)
d) f(-0.2)
e) g(1)
f) g(-4)
g) g(0) ​

Answer 1

a.) f(3) = 2.3² - 6.3 - 4

    f(3) = 2.9 - 18 - 4

    f(3) = 18 - 18 - 4

    f(3) = -4

b.) f(-2) = 2.(-2)² - 6.(-2) - 4

    f(-2) = 2.4 + 12 - 4

    f(-2) = 8 + 12 - 4

    f(2) = 16

c.) f(0) = 2.0² - 6.0 - 4

    f(0) = 0 - 0 - 4

    f(0) = -4

d.) f(0) = 2.0² - 6.0 - 4

    f(0) = 0 - 0 - 4

    f(0) = -4

e.) g(1) = -3.1² - 5 + 1

    g(1) = -3 - 5 + 1

    g(1) = -7

f.) g(-4) = -3.(-4)² - 5 + 1

   g(-4) = -3.16 - 5 + 1

   g(-4) = -48 - 5 + 1

   g(-4) = -52

g.) g(0) = -3.0² - 5 + 1

    g(0) = 0 - 5 + 1

    g(0) = -4