Question

Fan And Medal!
Factor Completely: x2 + 25

(x + 5)(x + 5)

(x + 5)(x − 5)

(x − 5)(x − 5)

Prime

Answer 1

(x + 5)(x + 5)

Answer 2

@SkydexKiwi that's wrong

Answer 3

You are missing one term. This expression is not factorable

Answer 4

what!?

Answer 5

You need to use complex solutions.

Answer 6

So its a prime?

Answer 7

@robz8 please explain?

Answer 8

oh wait it'
(sx + 5)(x − 5)
isn't it?

Answer 9

How is it not prime?

Answer 10

(x + 5)(x − 5)

Answer 11

it is prime

Answer 12

@SkydexKiwi Thats the factored form of x^2 - 25

Answer 13

haha i suck then been a while for this

Answer 14

You could do (a +b)^2 -2ab)

Answer 15

The difference of squares is factorable.
The sum of squares is not factorable.

The difference of cubes is factorabnle.
The sum of cubes is factorable.

This is a sum of squares, so it's not factorable.

Answer 16

x2 + 25? If x = 2 for example then x2 + 25 = 4 + 25 = 29 which is a prime number. Thus the only factors of 29 are 29 and 1 and hence the only factorization of 29 is 29 × 1. Similarly if x = 4 then x2 + 25 = 41 which is again prime. Hence the only factorization of x2 + 25 which is valid for every number x is

Answer 17

thats wha t i got from another site so i think im going with robs

Answer 18

You could also do (a+bi)(a-bi)... which is not a valid factorization... I knew it!! @robz8 ...well ?