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Marin Combs
Mathematics
30 June, 06:44
Factored version of y^2-2y-15
+5
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Jorden Vega
30 June, 07:04
0
Answer: (y-5) (y+3)
/ / If the coefficient of the y^2 is 1 and equation has integer-solution, than 15 must be divisible to that solution. Fermat's Theorem consequence
It's obvious that y=5 is solution.
/ / If x1 and x2 are solution to quadratic equation, ay^2+bx+c, where a is 1, then x1*x2=c. Fermat's Theorem
Divide equation by (y-5), If you cannot do this look for other obvious solutions.
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