123x2y – 138x2y is a like term of :

Since,123x2y – 138x2y= x2y(123 – 138)= x2y(-15)= -15x2yThe like term of -15x2y is 10x2y, since they both have same algebraic factors.

Q13 of 100 Page 312

123x²y – 138x²y is a like term of :

Since,

123x²y – 138x²y

= x²y(123 – 138)

= x²y(-15)

= -15x²y

The like term of -15x²y is 10x²y, since they both have same algebraic factors.

The side length of the top of square table is x. The expression for perimeter is:

The number of scarfs of length half metre that can be made from y metres of cloth is :

The value of 3x² – 5x + 3 when x = 1 is

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