Let the number = x
The product of three and a number is added to the square of the number to give ten.
So, the product of 3 and the number = 3x
The square of the number = x^2
(the product of 3 and the number) added to ( the square of the number)
So, it will be: 3x + x^2
So, the expression will be :
[tex]3x+x^2=10[/tex]