Math, asked by sumanupadhayay, 8 months ago

using the formula (a-b)^2=(a^2-2ab+b^2) do question (689)^2

Answers

Answered by mohapatramadhusmita

2

Step-by-step explanation:

using the formula (a-b)^2=(a^2-2ab+b^2)

689²=(700-11)²

=700²+11²-(2×700×11)

=490000+121-15400

=4,74,721

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