Question

Q1Use a suitable identity to get each of the following products:(i) (x + 3) (x -5) *​

Answer 1

hope this helps u

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(x + 3) (x -5) can be written as (x+3)(x+[-5])

we will use the identity

(x+a)(x+b) = x²+(a+b)x+ab

(x+3)(x+[-5]) = x²+(3+[-5])x+3*-5

                      = x²-2x-15

$\sf\large\blue{final\:answer\:is\:(x+3)(x+[-5]) \:=\:[tex]x^{²}$-2x-15}[/tex]

Answer 2

Answer:

by using identity (a+b) (a+c)=ac+ab

hope it helps you✌