A quadratic equation is in the form of x^2–2px + m = 0, w...

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PS · Problem Solving

705-805

Roots

A quadratic equation is in the form of

x^2–2px + m = 0

, where

m

is divisible by 5 and is less than 120. One of the roots of this equation is 7. If

p

is a prime number and one of the roots of the equation,

x^2–2px + n = 0

is 12, then what is the value of

p+n–m

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705-805

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