The sum of the squares of two consecutive odd positive integers is 74. Find the integers.
Question
Answer:
Let first odd number be xThen that would be [tex]x^2 + (x+2)^2=74[/tex]. We need to solve for x.
[tex]x^2 + (x+2)^2=74\\\ \\x^2 + x^2 + 4x+4 = 74\\\ \\2x^2 + 4x +4=74\\\ \\2x^2+4x-70 = 0\\\ \\2(x^2+2x-35)=0\\\ \\2(x+7)(x-5)=0\\\ \\x=-7\text{ or }5[/tex]
But we need positive integers so we would have [tex]\boxed{x=5}[/tex], so then our integers would be x, x+2 = 5, 7
Check work:
5² + 7² = 25 + 49 = 74.
So our integers would be 5 and 7.
Hope this helps.
solved
general
10 months ago
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