Question

Factors of x2 + 14x – 15​

Answer 1

Let's factor x2+14x−15

x2+14x−15

The middle number is 14 and the last number is -15.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get 14

Multiply together to get -15

Can you think of the two numbers?

Try -1 and 15:

-1+15 = 14

-1*15 = -15

Fill in the blanks in

(x+_)(x+_)

with -1 and 15 to get...

(x-1)(x+15)

Answer:

(x−1)(x+15)

Answer 2

Step-by-step explanation:

x^2 + 14x - 15

= x^2 - x + 15x - 15

= x( x -1) + 15 ( x - 1)

= ( x- 1 ) ( x + 15)