Using the identities of algebraic expressions, Find the value of ${(4.9)}^{2}$ .

24.01

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24.25

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Solution

The correct option is A
24.01

${(4.9)}^{2}$
= ${(5.0 - 0.1)}^{2}$
= ${(5)}^{2}$ + ${(0.1)}^{2}$ - 2(5)(0.1)
=25 + 0.01 - 1
=24.01

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