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## Wednesday, August 17, 2011

### CBSE MATH CLASS 8th Algebraic Expression Test/Guess paper

CBSE TEST PAPER 8th Algebric Expression

1.     Numerical coefficient of 8x3yz2 is ________
2.     Monomial is a ________________
3.         Write like terms from 2x2, 2x, 2x3, - 5x, 11x4
4.     Write numerical coefficient of . 3x3yza2
5.     Find area of rectangle with sides 3x and 5y
6.     Factorise 3xy + 9x2y37.     Divide 7x2y2z2 ÷ 21xyz
8.     Subtract 5x2 – 4y2 + 6y – 3 from  7x2 – 4xy + 8y2 + 5x – 3y.
9.     Add 4y (3y2 + 5y – 7) and 2 (y3 – 4y2 + 5)
10.  Simplify (a + b) (2a – 3b + c) – (2a – 3b) c.
11.  . Simplify (a + b + c)(a + b – c)
12.  find the products. (i) (2a2 + 9) (2a2 + 5)  (ii) (0.4p – 0.5q)2
13.  Simplify.  (m2 – n2m)2 + 2m3n2
14.  Evaluate (i) 998 (ii) 297 × 303 (iii) (1.02)2 – (0.98)215.  Find the value of x2+y2 if x+y =12 and xy= 14
16.  Find the value using algebric formula i] 93x94     ii]  704217.  Find value of x2+y2       if x+1/x=3
18.  By division show that x-1 is factor of x3-1
19.  Factories:         25-a2-b2-2ab
20.  Subtract: 3a (a + b + c ) – 2 b (a – b + c) from 4c ( – a + b + c )
21.  If ( x + 1 / x ) = 4,  Find the value of      ( x2 + 1 / x2 ) and (x4 + 1 / x4 )
22.  If ( x - 1/ x ) = 3 .Find the value of   (x3 + 1 / x3 )
23.  Find the remainder obtained by dividing  x3 + 3x2 - 5x +4 by x + 1
24.  Evaluate using algebraic identities   (54)2, (78)2 (999)2
25.  . If x - y = 7  ,   xy = 9  Find the value of  x2 + y2
26.  If x + y = 12 , xy = 27  Find the value of x3 + y3
27.  If a2 + b2 + c=20 , a + b + c = 6  find  ab + bc + ca
28.  If ( x2 + 1 / x2 ) = 83 .  find  (x3 - 1 / x3 )
29.  What must be subtracted from   4p2-2pq- 6q2 - r +5 to get  - p2 + p q - 8q2 - 2r+5
30.Devide (i)    x3 - 1 by  x - 1   (ii) 7 +15x -13x2 +5x3 by 4 - 3x + x2
31.  Evaluate(i) 1.5 3 - 0.9- 0.6(ii) (a - b )3 + (a + b )3  (iii) (x + 2y -3z)2 +(x - 2y +3z)2
32.  . If (x4 + 1 / x4 ) = 47    find the value of   (x3 + 1 / x3 )
33. Find the product of
(i) (x4 + 1 / x4 ) and      ( x + 1 / x )
(ii)  (2x2 +3x - 7)(3x2 -5x - 4)
34.  Two adjacent side of a rectangle are 5x2-3y2 and x2 - 2xy Find its perimeter
35.  The perimeter of of a triangle is 6p2 - 4p + 9 and two of its adjacent side are   p2 - 2p + 1 and  3p2 - 5p + 3. Find third side of triangle.http://jsuniltutorial.weebly.com/