raghavvishnani20 raghavvishnani20

08-02-2020
Mathematics

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evaluate (491) square in the form of (a-b) square

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Hrishii Hrishii

08-02-2020

Step-by-step explanation:

[tex](491)^{2} \\ \\ = (500 - 9)^{2} \\ \\ = ( {500})^{2} - 2 \times 500 \times 9 + ( {9})^{2} \\ \\ = 250000 - 9000 + 81 \\ \\ = 16000 + 81 \\ \\ = 16081 \\ \\ \huge\purple{ \boxed{\therefore (491)^{2}= 16081}}[/tex]

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