Question

Tick to find square (25)²

first we have to tke square of five and then multiply 2 and Itsnext no. i.e 3 2×3 25 =625
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Answer 1

Answer:

we know that 20 + 5 makes 25 ,

and we also know that (a+b)^2 = a^2 +b^2 + 2ab

so,

(20+5)^2 = (20)^2 + (5)^2+ 2 *20*5

=400+ 25 + 200

= 625

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