Question

4. Using an appropriate identity, evaluate the following
(a) 99sq.
(b) 998sq.
(0) 93sq.
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Answer 1

Answer:

Step-by-step explanation:

a)99^2=(100-1)^2

(a-b)^2=a^2+b^2-2ab

=10000+1-200

=9801

b)998^2=(1000-2)

(a-b)=a^2+b^2-2ab

1000000+4-4000

996004

b)93^2=(100-7)^2

10000+49-1400

=8649

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