13. Show that the square of any positive integer is either of the form 3m or 3m+1 forsome integer m14. What should be added in the polynomial x3 -2x2 3x 4So that it is compldivisible by x2-x.5. Two years ago, Salim was thrice as old as his daughter and six years later he wolder than twice her age .How old are they now?

13. Show that the square of any positive integer is either of the form

1.	13. Show that the square of any positive integer is either of the form 3m or 3m+1 forsome integer m14. What should be added in the polynomial x3 -2x2 3x 4So that it is compldivisible by x2-x.5. Two years ago, Salim was thrice as old as his daughter and six years later he wolder than twice her age .How old are they now?
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