graphing parabolas, etc, systems of inequalities

[holic]

I'm having trouble graphing the following equations:

. . .x² + y² < 9
. . .(x - 2)² + y² < 9

Those are a set of equations involving shading, etc.

And:

. . .(x - 1)² + (y - 2)² < 25

buggers! -_-

 

[arthur ohlsten]

I don't know how to help simply.

X² + Y² = R² is a circle of radius R.

[X - a]² + [Y - b]² = R² is a circle centered at the point (a, b) and of radius R.

Then x² + y² < r² is the area inside the circle centered at 0,0 and of radius r

x² + y² < r² is the circumference plus the area inside the circle

Hope this helps
Arthur

 

[holic]

I don't know how to help simply.

X² + Y² = R² is a circle of radius R.

[X - a]² + [Y - b]² = R² is a circle centered at the point (a, b) and of radius R.

Then x² + y² < r² is the area inside the circle centered at 0,0 and of radius r

x² + y² < r² is the circumference plus the area inside the circle

Hope this helps
Arthur

that actually helped alot, thank you sir!