Question

Na funçao f : R-R, com f(x) = x²-3x+1 Determine :

f(-8)

f(7)

Answer 1

f(-8) = (-8)² -3 (-8) + 1 = 64 + 24 + 1 = 89
f(7) = 7²  -3 (7) + 1 = 49 - 21 + 1 = 29

Answer 2

F(-8)= 8²-3.(-8)+1
F(-8)= 64+24+1
F(-8)=88+1
f(-8)=89

f(7)= 7²-3.7+1
f(7)= 49-21+1
f(7)=28+1
f(7)=29