2. Questions Bank
  3. 6th Class
  4. Mathematics
  5. Algebra

6th Class Mathematics Algebra Question Bank Algebra

  • question_answer
    Read the following statements carefully and choose the correct answer. (i) The value of \[2({{a}^{2}}+ab)\,+3-ab\] equals to 38,when \[a=5,\,b=-3\]. (ii) If the value of \[2{{x}^{2}}+x-a\] equals to 5 for \[x=0,\] the value of a should be - 5.     

    A)  Both (i) and (ii) are true.                

    B)  Only (ii) is true.                        

    C)  Only (i) is true

    D)  Neither (i) nor (ii) is true.

    Correct Answer: B

    Solution :

         (i) \[2({{a}^{2}}+ab)+3-ab\] \[=2\,(52+5(-3))+3-5\times (-3)\] = 38 (ii) \[2{{x}^{2}}+x-a=5,\,x=0\] \[\therefore \,\,0+0-a=5\] \[\Rightarrow \,a=-5\]


You need to login to perform this action.
You will be redirected in 3 sec spinner