Question

(a + 1) (a +2) = ? ​

Answer 1

Answer:

.......

.....

......

...

..........

Answer 2

Answer:

Using identity (x+a) (x+b)= x^2+(a+b) x+ab

(a+1) (a+2)

=a^2+(1+2) a+1*2

=a^2+(1+2) a+2

Or, a^2+a+2a+2

a^2+3a+2