Question

find the square of the following number by column method : 42​

Answer 1

Answer:

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Step-by-step explanation:

(a+b)

2

=a

2

+2ab+b

2

here

42=40+2

(40+2)

2

=(40)

2

+2(40)(2)+2

2

=1600+160+4

(40)

2

=1764