Question

$(2 + 5 ) {}^{2}$
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Answer 1

Answer:

Using identity( a+ b)^2 = a^2 + b^2 + 2ab

here, a = 2

b= 5

(2)^2 + (5)^2 + 2(2)(5)

4 + 25 + 20

29 + 20

49

Alternative method

( 2+ 5)^2

(7)^2

49