Question

Using identities,simplify:(1005)²
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Answer 1

Answer:

(105)2=(100+5)2        [(a+b)2=a2+b2−2ab]

=(100)2+(5)2+2(5)(100)

=10000+25+1000

=11025.

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Answer 2

Answer:

So the answer 1010025...

Step-by-step explanation:

${(1005)}^{2} \\ = {(1000 + 5)}^{2} \\ = {(1000)}^{2} + 2 \times 1000 \times 5 + {(5)}^{2} \\ = 1000000 + 10000 + 25 \\ = 1010025$

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