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22-04-2018
Mathematics

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Someone help me with this please! I have to find the diameter of a circle given the equation

Someone help me with this please I have to find the diameter of a circle given the equation class=

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Аноним Аноним

22-04-2018

convert to the standard form:-

x^2 + 14x + y^2 - 6y = -42

(x + 7)^2 - 49 + (y - 3)^2 - 9 = -42

(x + 7)^2 + (y - 3)^2 = -42 + 49 + 9 = 16

r^2 = 16 so r = 4 and the diameter = 2*4 = 8 Answer

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