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anonymous
 5 years ago
A circle is defined by the following equation:
3x^(2)+3y^(2)+30x+30y+150=0
What is its radius?
anonymous
 5 years ago
A circle is defined by the following equation: 3x^(2)+3y^(2)+30x+30y+150=0 What is its radius?

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0divide all by 3 (x^2 +10x) + (y^2 +10y) = 50

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0now complete the squares of the x and y (x^2 +10x +25) + (y^2 +10y +25) = 502525 (x+5)^2 +(y+5)^2 = 100 are you sure it aint 150?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0teh radius is most likely 10

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no, in the original equation, all numbers are positive.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0looks to be 0 for some reason

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0i gotta wonder, is 0 correct?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0When dividing by 3, (x^(2)+10x)+(y^(2)+10y)=50, how do you get 10x and 10y?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.03(x^2 +10x+25)75 +3(y^2 +10y+25)75= 150 3(x^2 +10x+25) +3(y^2 +10y+25)= 150 +75+75 = 0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I dont understand how you get rid of the x and y

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0i dint get rid of anything :) i moved them around to work with them easier, thats all

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but if there's a variable on the left side of the equation, shouldnt there still be a variable on the right side?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Actually, shouldn't it remain 502525, and not 50+25+25?
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