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29 September, 13:13

Find two consecutive positive integers such that the sum of their squares is 181

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  1. 29 September, 15:33
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    Find two consecutive positive integers such that the sum of their squares is 181

    consecutive positive integers: x and x+1

    (x) ² + (x+1) ² = 181

    x² + (x² + 2x + 1) = 181 (expanded (x+1) ²)

    2x²+2x+1=181 (simplified)

    2x²+2x+1-181=181-181 (subtraction property)

    2x²+2x-180=0

    Factor to solve for x

    2x²+2x-180=0

    2 (x+10) (x-9) = 0

    2≠0

    x+10=0

    x+10-10=0-10

    x=-10 number must be a positive integer, cannot use - 10

    x-9=0

    x-9+9=0+9

    x=9 we can use this one, it is positive

    x=9 and x+1=9+1=10

    two consecutive positive integers such that the sum of their squares is 181 are:

    9 and 10

    9²+10²=181

    81+100=181

    181=181
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