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Think about this for a moment.

If you multiply 2 ordinary numbers together and get 0. What can you say about those?

2 x 3 = 6

0 x 8 = 0  that works

0 x 0 = 0 that works too.

the only way that two things can multiply together to give 0 is if one or both of them equals zero.

so for your question.

either x+4=0  OR  x-3=0

you can finish it can't you?

Sorry Chris. Thank you Alan. 

I wasn't at all sure that I was right which is why I asked for it to be checked.

Yes I can see I missed one of the spaces!  Silly me.   

You're correct, SquareRoot......I forgot that that hill DOES have a slope!!!

Guess I'll have to search elsewhere......still...a big "Thumbs Up" for liking our humor!!

I even gave you 3 points for each comment..........!!!

(Be careful about calling Sisyphus a "zero,' though.....he's touchy in some areas....)

Read very humour Roman zero transcriptions on here. Fun People!

Sisyphus push bolder up to hill. Hill have slope so can not have zero on hill.

Reason for in derivative constante to be zero.

Reason géométrique : derivative is = to slope of tangent. The slope of a constante fonction is = 0.

Reason algebraic : lim c ->0, 1/c * (f(x+c) - f(x) ) = 1/c * (constante - constante) = 1/c * 0 = 0. For numbers  real

I decided to try to answer one of the timeless questions of science: just what is the airspeed velocity of an unladen swallow?

Look here for the answer

http://style.org/unladenswallow/

"0"

BTW.......you don't happen to know where I can find a used Roman Numeral version of one of these on sale, do you??

Let's suppose that it takes three hours to bake a pie. Then how many could we bake in 60 hrs??

Answer....20 pies......and everyone knows that 20 "pi's" ≈ 62.832

So....there's "x".......(more or less)