Question

express the following as the sum of two consecutive integers 21 square​

Answer 1

if the two consecutive integers are x and x+1

there sum is 21square

i.e , x + x+ 1 = 21 square

$2x + 1 = 21 ^{2} \\ 2x + 1 = 441 \\ 2x = 441 - 1 \\ 2x = 44 0 \\ x = 440 \div 2 \\ x = 220$

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