Question

seja a funçao f(x)=2x2-8x+3, determine f(6)+f(3)-f(-2)

Answer 1

f(6)=2.6²-8.6+3
=72-48+3
=27

f(3)=2.3²-8.3+3
=18-24+3
=-3

f(-2)=2.(-2)²-8.(-2)+3
=8+16+3
=27

27+(-3)-(+27)
=27-3-27
=-3