Question

1. Using appropriate identities, find the following products:
(i) (x + 6)(x + 6)
(ii) (x + 5)(x - 6)​

Answer 1

Answer:

(x + 6) (x + 6) = (x +6)^2 = x^2+ 12x + 36.......(a+b)^2=a^2+2 ab+b^2

(x +5) (x-6)

let a-> 5 and b->-6

According to identity (x+a)(x+b) = x^2+ x (a+b)+ ab

x^2+x (5+(-6)) + (5) (-6)

x^2-x-30

Hope this answer is helpful