Identify the center and the radius of the circle.
(x - 1)2 + (y + 3)? = 4

Comparing with Equation of circle( x - h )²+ ( y - k )² = r²,

center of circle = (h,k) = (1,-3)

Radius of circle =√4 = 2unit

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb