Question

2. Evaluate using identity
() (608)2 – (609)
(ii) (78)2 - (88)​

Answer 1

Answer:

1) (i) (609)  

2

=(600+9)  

2

=(600)  

2

+2×600×9+(9)  

2

=360000+10800+81=370881

(ii) (725)  

2

=(700+25)  

2

=(700)  

2

+2×700×25+(25)  

2

=490000+35000+625=525625