Question

Dada a função f(x)=x²-2x-3, calcule:
a) f(2)=

b)f(4)=

Answer 1

a) f(2) = $2^{2} - 2\cdot2 -3 = 4 - 2 -4 = 0 - 3 = -3$
b)f(4) = $4^{2} - 2\cdot4 - 3 = 16 - 8 - 3 = 8 -3 = 5$