Fill in the blanks to make the statements true.

Sum or difference of two like terms is ______ .

The expression for the number of diagonals that we can make from one vertex of a n sided polygon is:

The length of a side of square is given as 2x + 3. Which expression represents the perimeter of the square?

Fill in the blanks to make the statements true.

In the formula, area of circle = πr², the numerical constant of the expression πr² is _____ .

Fill in the blanks to make the statements true.

3a²b and –7ba² are _____ terms.