If Pythagorean Theorem is being used to try and prove a triangle is a right triangle, is there a circumstance where the problem will be using Negative Numbers? Explain why or why not.

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Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142