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Mc2 Mc2
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4 years ago
Quadratic Descriminant to find K
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Educator
4 years ago
25n^2-kp looks like a difference of squares. For example:

a^2 - b^2 = (a - b)(a + b)

If they want it as: (5n+9p)(5n-9p)

Then k has to be 81, because only then will you get 9 after square-rooting
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