Question

Find the product using suitable identity: a) (x +5(x - )(x2 + 3)(x+ +​

Answer 1

Answer:

We need to find value of (x+5)(x+2)

We know identity (x+a)(x+b)=x

2

+(a+b)x+ab

Therefore, (x+5)(x+2)=x

2

+(5+2)x+5×2

=x

2

+7x+10