ssc online exam test cgl
SSC CGL Tier 1 :: QA Test 45
Home » SSC CGL Tier 1 » QA Test 45 »
advertisements
1 . The term, that should be added to (4$x^2$ + 8x) so that resulting expression be a perfect square, is
[ A ]    2x
[ B ]    2
[ C ]    1
[ D ]    4 right
Answer : Option D
Explanation :
4$x^2$ + 8x = ($2x^2$) + 2 × 2x× 2 = $(2x+ 2)^2$– 4 So, we have to add up 4 to make it a perfect square
Workspace Report error

advertisements
Write your comments here:
Name *: Email:

Exercise

    © 2014 - 2015 by ssconlineexam.com . All Rights Reserved | Copyright | Terms of Use & Privacy Policy

    Contact us: info@ssconlineexam.com     Follow us on twitter!

     

    DMCA.com Protection Status