Question

Factorise x2 - 8x + 15

Answer 1

Answer:

(x-5) (x-3)

Step-by-step explanation:

At first find two numbers, that if you multiply, you get +15x², and the same number, if you do addition, get -8x

Those numbers are: -5x and -3x.

Now replace the -8x with the -5x and -3x. (x² - 5x - 3x + 15)

Now factorise as normal. You should get (x-5) and (x-3)

Hope I helped!

Answer 2

Answer:

${x}^{2} - 8x + 15 \\ (x - 5)(x - 3)$

I hope I helped you^_^