Question
107 x107 + 93 x 93 = ?
Answer: Option C
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107 x 107 + 93 x 93= `(107)^21` +`(93)^2` = `(100 +7)^2` +`(100-7)^2`
= 2 x [`(100)^2` +`7^2`] = 2(10000+ 49) = 2 x 10049 = 20098
`because` [ ` (a + b)^2` + `(a - b)^2` = 2(`a^2 +b^2`)]
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