Question

using identity evaluate: (102)²​

Answer 1

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Answer 2

Answer:

$\rm 10404$

Step-by-step explanation:

We have,

$\rm (102)^2$

$\rm = (100+2)^2$

by using identity,

$\boxed{\rm (a+b)^2 = a^2+b^2+2ab}$

$\rm (100+2)^2 = (100)^2 + (2)^2 +2(100)(2)$

$\rm = 10000 + 4 +400$

$\rm = 10000 +404$

$\rm = 10404$