NCERT 8th class worksheet on Algebraic expressions and Identities.

NCERT  Class 8^th          Worksheet on algebraic expressions and Identities

Answer the following:

     1.       Subtract (4x²-8x+1) from the sum of (2x²+3x) and (9x²-2).

     2.      Add 8a³+3a²-6a-10, -6a³-5a²+7 and 8a²+5a.

     3.      Find the area of rectangle whose length and breadth are (ab²c, a²bc).

     4.      State the factors of each of the following.

(a)   20pq,  (b)  7x²y²

     5.      Write the coefficients of each of the following.

(a)    12a²b,  (b) -3xzy²   

     6.      Simplify (a+b)(c-d)+(a-b)(c+d)+2(ac+bd).

     7.      Find the value of the following expression when x= -1,y= -2, z= 2.

     -2x(3x-4y)+2y(6y-9z)+2z(4z-x)  

     8.      Find the product and verify the result for given values (2x-y)(7x-5y); x=0 and y= -2.        

     9.      Write the four algerbraic identities.

    10.    Showthat (3p-q)² + 12pq = (3p+q)².

    11.     Find the value using identities

(a)   103²  (b) 19.8²  (c) 998 x 1002   (d)  9.7 x 10.3

    12.    Simplify p² - q² + (p + q)².