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SAI International School

                                                        Class VIII



          Mathematics
          Chapter 9 – Algebraic Expressions & Identities
          Worksheet
          Subtopic: Standard Identities


          1.Which of the following is the coefficient of x in 4x y ?
                                                            2
                                                          2
                                                     2
             1. 0
             2. 4
             3. x 2
             4. 4y 2
          2. Which of the following is the numerical coefficient of -78xy?
             a) 78
             b) -78
             c) -5
             d) -y
          3. pqr is what type of polynomial?
             a) Monomial
             b) Binomial
             c) Trimonial
             d) None of these
          4. The value of x - 5 at x= -2 is-
                          2
             a) -2
             b) -1
             c) -4
             d) -5
          5. a -b is a product of
              2
                2
             a) (a+b)(a-b)
             b) (a+b)(a+b)
             c) (a-b)(a-b)
             d) None of these
          6. Which of the following is obtained by subtracting x -y from y - x ?
                                                                    2
                                                                        2
                                                             2
                                                           2
             a) -2(x -y )
                       2
                    2
             b) -2(x + y )
                    2
                        2
             c) 2(x + y )
                    2
                       2
             d) 2(x - y )
                    2
                       2
          7. Multiply the binomials:
                   and
          8. Simplify:
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