What is the radius of a circle with the equation x2 + y2 – 14x + 10y = 250?

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02-04-2017
Mathematics

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What is the radius of a circle with the equation x2 + y2 – 14x + 10y = 250?

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kaveejethwa kaveejethwa · Answer 1 · 2017-04-02T04:48:17+02:00

kaveejethwa kaveejethwa

02-04-2017

complete the square .

x^2-14x = (x-7)^2-(-7)^2
= (x-7)^2-49
y^2+10y = (x+5)^2-(5)^2
=(x+5)^2-25
(x-7)^2+(y+5)^2-49-25=250
(x-7)^2+(y+5)^2=324
=sqrt 324
=18

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