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`107xx107+93xx93=?`

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`107xx107+93xx93=?`
A. 19578
B. 19418
C. 20098
D. 21908
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1 Answer

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Correct Answer - C
`107xx107+93xx93=(107)^(2)+(93)^(2)`
`=(100+7)^(2)+(100-7)^(2)=2(100^(2)+7^(2))`
`=2(10000+49)`
`=2xx(10049)=20098`
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