Grade 8 Maths Test

                          Algebric Identities                                           20

Q1: Find                                                                                                         4

          a)(2/3 *x+4/5*y)(2/3*x+4/5*y)    b)(1/3 *X^2-9)(1/3*X^2-9)

          c)(3m-4n)^2                  d)(a/2 +2/a)^2

Q2 Find                                                                                                                 4

1. (x-1/x)(x+1/x)          b)(7x+11Y)(7x-11y)
2. (4x^2-25)                  c)(9x-10)^2

Q3                                                                                                                   2

          If (x+1/x) =4

find   i)(x^2+1/x^2)      ii)(x^4 +1/x^4)   

Q4     Find using identities                                                                          4

1. 82^2-18^2          iii)(197*203)
2. (0.98*1.2)           iv)(999^2)

Q5     Find difference of                                                                              2

          i)(3q+7p^2-2r^3+4) and( 4p^2-2q+7r^3-3[s1] )

Q6     Find sum of                                                                                         2

          i)(6xy + 4x^2 +5Y^2) and ( 3y^2-2xy)

Q7     Find product of                                                                                  2

          (2x+y)(3x-2y-7))

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                          Grade 8 Maths Test

                          Algebric Identities                                           20

Q1: Find                                                                                                         4

          a)(2/3 *x+4/5*y)(2/3*x+4/5*y)    b)(1/3 *X^2-9)(1/3*X^2-9)

          c)(3m-4n)^2                  d)(a/2 +2/a)^2

Q2 Find                                                                                                                 4

1. (x-1/x)(x+1/x)          b)(7x+11Y)(7x-11y)
2. (4x^2-25)                  c)(9x-10)^2

Q3                                                                                                                   2

          If (x+1/x) =4

find   i)(x^2+1/x^2)      ii)(x^4 +1/x^4)   

Q4     Find using identities                                                                          4

1. 82^2-18^2          iii)(197*203)
2. (0.98*1.2)           iv)(999^2)

Q5     Find difference of                                                                              2

          i)(3q+7p^2-2r^3+4) and( 4p^2-2q+7r^3-3[s1] )

Q6     Find sum of                                                                                         2

          i)(6xy + 4x^2 +5Y^2) and ( 3y^2-2xy)

Q7     Find product of                                                                                  2

          (2x+y)(3x-2y-7))

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