Question

PLEASE EXPLAIN HOW YOU GOT THE ANSWER!!!

Let P(x) be a polynomial such that P(5)=0.
Which one of the following must be a factor of P(x)?

A) x^2-25
B)x +25
C) x-5
D) x+5

Answer 1

well all you need to do is substitute x = 5 into each polynomial...

the one that gives a zero answer is the solution to the question

looking at

D) x + 5 make the substitution 5 + 5 = 10

so D isn't the correct one

hope it makes sense

Answer 2

my lord you're a genius

Answer 3

thanks man I owe you one

Answer 4

wait actually hold on

Answer 5

C) 5-5 =0
A) 25-25= 0

Answer 6

??????

Answer 7

am I doing something wrong?

Answer 8

no you are correct...

if you look at A x^2 - 25 = (x -5)(x + 5)

and you know if P(x) = x-5 then P(5) = 0

so it seems there is a problem... I'd expect you'd need to contact the teacher...

as for me there is a typo in the solutions... if they only want 1 answer