Question

find the value using suitable identity,(x+3)(x-5)​

Answer 1

answer is in attachment

Answer 2

Step-by-step explanation:

Given that: (x+3)(x-5)

To find:

Find the value using suitable identity.

Identity used:

$\boxed{(x+a)(x-b)=x^2+(a-b)x-ab}$

So,apply this identity ,as in the given expression

a=3

b=5

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

Hope it helps you.