pre-cal

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find the center (h,k) and radius r of the circle and then find the intercepts, if any.

5x^2+30x+5y^2=0

  • pre-cal -

    divide by 5
    x^2 + 6x + y^2 = 0
    complete the square for the x terms
    x^2 + 6x + 9 + y^2 = 9
    (x+3)^2 + y^2= 9

    take it from there

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