college algebra--need help please!!

write the standard form of the equation and the general form of the equation of the circle with radius r and center (h,k)
r=10; (h,k)=(8,-6)

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  1. Given: C(h,k) = C(8,-6), r = 10.

    STD Form: (x-h)^2 + (y-k)^2 = r^2.
    (x-8)^2 + (y+6)^2 = 100.

    x^2-16x+64 + y^2+12y+36-100 = 0.
    X^2 + Y^2 -16x + 12y - 64 = 0
    Gen. Form: X^2 + Y^2 Ax + By + C = 0.

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