Question

1. Expand the following using suitable
identities
a) (x + 13)(x + 20)
b) (x+30)(x+30)
c) (x-7)(x-7)
d) (x+1)(x-1)
e) (2m+1/4)(2m+1/4)
f) (3a-1.5)(3a+1.5)​

Answer 1

Step-by-step explanation:

1)We have,

(x+13)(x+20)

=x

2

+20x+13x+260

=x

2

+33x+260

2)