Question

Using the identities, evaluate the following:
(i) 812
(ii) 972 (WITH FULL EXPLANATION

Answer 1

Answer:

812=(800+12)^2

=800^2+2x800x12+12^2

=64000+19200+144

=83344

972=(1000-28)

=1000^2-2x1000x28+28^2

=1000000-56000+784

=944784

Answer 2

Answer:

ANSWER

(81)

2

= (80+1)

2

= (80)

2

+2×80×1+(1)

2

[Using, (a+b)

2

=a

2

+2ab+b

2

]

= 6400+160+1

= 6561

Step-by-step explanation:

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