College Algebra
posted by Amary .
Write the equation of the circle in standard form. Find the center, radius, intercepts and graph the circle. x^2+y^2+14x+18y=81

rearrange things a bit:
x^2+14x + y^2+18y = 81
x^2+14x+49 + y^2+18y+81 = 81 + 49 + 81
(x+7)^2 + (y+9)^2 = 49
now the rest is easy.
C'mon back if you get stuck.