Question

find the Square.......​

Answer 1

Answer:

102

(100+2)²

(a+b)²=a²+2ab+b²

(100)²+2(100)(2)+(2)²

10000+400+4

10404

this is ur answer

Answer 2

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To find :

The square of 102, using the identity :

$\bf (a + b)(a - b) = {a}^{2} + 2ab + {b}^{2} \\ \\ \bf Here \: let \\ \bf a = 100 \: \: \: \: and \: \: \: \: \: b = 2 \\ \bf then \: we \: get : \\ \\ \bf (100 + 2)(100 + 2) \\ \bf = (100)^{2} + 2(100)(2) + {(2)}^{2} \\ \bf = 10000 + 2(200) + 4 \\ \bf = 10000 + 400 + 4 \\ \bf = 10404$

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