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kow [346]
3 years ago
13

Factored version of y^2-2y-15

Mathematics
1 answer:
marin [14]3 years ago
3 0

Answer: (y-5)(y+3)

<em>// 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</em>

It's obvious that y=5 is solution.

<em>// If x1 and x2 are solution to quadratic equation, ay^2+bx+c, where a is 1, then x1*x2=c. Fermat's Theorem</em>

Divide equation by (y-5), If you cannot do this look for other obvious solutions.

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