Q

# Use suitable identities to find the following product: (ii) (x + 8) (x - 10)

1.(ii) Use suitable identities to find the following product:

(ii)    $(x+8)(x-10)$

Views

We will use identity

$(x+a)(x+b)=x^2+(a+b)x+ab$

Put   $a = 8 \ \ and \ \ b = -10$

$(x+8)(x-10)= x^2+(-10+8)x+8\times (-10)$

$= x^2-2x-80$

Therefore, $(x+8)(x-10)$  is equal to  $x^2-2x-80$

Exams
Articles
Questions