Question

Do the point (3,0) lie on the graph of P(x)=x^3-7x^2+15x-9 ?

Answer 1

let x = 3 and evaluate P(x)=x^3-7x^2+15x-9

Answer 2

I came up with -18 so it doesn't lie on this graph ?

Answer 3

hm, check your math one more time

Answer 4

3^3 = 27
7(3)^2 = 63
15(3) = 45

27-63+45-9 = ?

Answer 5

ooo so I would get 0 ?

Answer 6

yes

Answer 7

So (3,0) doesn't lie on the graph ?

Answer 8

think carefully

(3,0) means that P = 0 when x = 3, so (3,0) lies on the graph