1.

Sum of the square of the two consecative natural number is 20​

Answer»

LET the NUMBERS be X, X+1

(X+X+1)² = 20

(2X + 1)² = 20

4X² + 1 + 4X = 20

4X² + 4X = 19

4(X² + X) = 19

X² + X = 19/4

X² + X = 4.75

X(X+ 1) = 4.75

so, X = √(4.75/X)



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