Plot a circle.

[henkoegema]

Can somebody tell me how to plot a circle with formula x^2 +y^2 +8x + 7 = 0 in Mathematica (on a raspberry pi3 + raspbian).
Without converting the formula to x-a)^2+(y-b)^2=r^2.

I'm looking for something like: Plot[x^2 +y^2 +8x + 7 = 0, ...??.....].

Is this possible?

[jardino]

Try:

circle.jpg (58.15 KiB) Viewed 12202 times

The first equals sign is important.

Have a look at the current issue of MagPi for tips.

Alan.

[henkoegema]

Thanks very much Alan. For your solution and for your tip
That's what I was looking for.
I'm a total beginner.( not in mathematics, but in Mathematica)

[jardino]

My pleasure.

I'm not a total beginner, but am still dipping my toes in the water.

Alan.

[henkoegema]

My pleasure.

I'm not a total beginner, but am still dipping my toes in the water.

Alan.

I'm trying to do the same.
It's nearly 50 years ago I was a math teacher.
Have forgotten a lot. So I'm refreshing my (old) brains.

[Mortimer]

You have more than one brain! Lucky you!

[jardino]

My problem in learning Mathematic is not the maths (I'm fairly competent in maths), but finding a suitable goal to work to.
I bought Schaum's outline on Mathematica, but got bored doing exercise after exercise.

Alan.

[henkoegema]

My problem in learning Mathematic is not the maths (I'm fairly competent in maths), but finding a suitable goal to work to.
I bought Schaum's outline on Mathematica, but got bored doing exercise after exercise.

Alan.

I didn't know about the book Schaum's outline on Mathematica.
Thanks for mentioning it. It's perfect for me.

[jardino]

Second Edition: ISBN-13:978-0-07-160828-2.

(Though Amazon don't believe in ISBN numbers.)

Alan.

[Micha1982]

I am a complete math-noob...but I love mathematica (and internet )...it offers so many possibilities to play around and create interesting pictures and videos...: