Question

factor n^2 -4n - 45

Answer 1

Find the two numbers that you can multiply to get -45 and add those numbers to get -4.

Answer 2

The factors of 45 are: 1x45 3x15 5x9

Answer 3

Which factors you add or subtract will give you -4

Answer 4

5x9

Answer 5

Good

Answer 6

But since you have -45 and -4 that means that either the numbers will be negative and the other one will be positive

Answer 7

Lets say that -5x9=-45 -5+9=4
5x-9=-45 5-9=-4

Answer 8

n^2 -4n -45 = n^2 -9n + 5n -45

Therefore: n(n-9) + 5(n-9) = (n+5)(n-9)

Answer 9

i see

Answer 10

So we will choose -9 and 5
(n-9)(n+5)

Answer 11

Did you understand?

Answer 12

I have another one, let me work it out and see if I get it right. Hang on Faris.

Answer 13

OK

Answer 14

But can u make it quick please cause I have to go after 10minutes