Math, asked by vidyazaware3, 3 months ago

Find the value of the following by using
identities.
a) (210)square

Answers

Answered by Itzsweetcookie

Answer:

$10201$

(210)2

=(209+1)2

Using (a+b)2=a2+b2+2ab

(209+1)2=1002+12+2×100×1

=40000+4000+100

=44000+100

=44100.

shahnoor21: well your answer is wrong

vidyazaware3: This is correct

vidyazaware3: thanks

shahnoor21: hey check once

shahnoor21: u used (209+1)²

shahnoor21: so u should take 209² + 2×209×1 + 1²

Answered by shahnoor21

Step-by-step explanation:

210 = 200 + 10

(200+10)²

(200)² + 2 (200) (10) + (10)²

= 40000 + 4000 + 100

= 44100

vidyazaware3: and similarly there is 190 instead of 210

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