Question

Can someone help me with this ?!

If p(x)=x^2+x+1 and Q(x)=5x^2-1, find the following

1. Q(4)
2.p(-4)
3.p(1/2)

Answer 1

Answer: 1. 79

2. 13

3. 7/4

Explanation:

Q(x)=5x^2-1

Q(4)=5(4)^2-1

=5(16)-1

=80-1

Q(4) = 79

p(x)=x^2+x+1

p(-4)=(-4)^2+(-4)+1

=16-4+1

p(-4) =13

p(x)=x^2+x+1

p(1/2)=(1/2)^2+(1/2)+1

=1/4+1/2+1

2+4+8/9

=14/8

p(1/2) = 7/4