MHB How to Write a Polynomial in Standard Form with Three Variables?

bergausstein
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how do you write a polynomial in three variables say x,y,z in standard form?
 
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The question is somehow vague , is this what you mean ?

$$P(x,y,z)= a_n (xyz)^n +a_{n-1}(xyz)^{n-1}+\cdots +a_1 xyz +a_0 $$
 

Thread 'Trigonometry problem of interest'

Seemingly by some mathematical coincidence, a hexagon of sides 2,2,7,7, 11, and 11 can be inscribed in a circle of radius 7. The other day I saw a math problem on line, which they said came from a Polish Olympiad, where you compute the length x of the 3rd side which is the same as the radius, so that the sides of length 2,x, and 11 are inscribed on the arc of a semi-circle. The law of cosines applied twice gives the answer for x of exactly 7, but the arithmetic is so complex that the...
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