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Question

Without squaring find the value of 243²-242²

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Solution

It is in the form of a^2 -b^2
therefore formula of a^2-b^2 =(a+b)*(a-b)
(243²-242²)=>(243+242) *(243-242)
(243²-242²) = 485*1
243²-242² = 485

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