0 votes 0 votes If $x^2 + 5y^2 + z^2 = 2y(2x+z)$, then which of the following statements are necessarily true? $x=2y$ $x=2z$ $2x=z$ Only I Only II Only III Only I and II Quantitative Aptitude cat2002 quantitative-aptitude algebra + – go_editor asked Mar 1, 2016 edited Apr 9, 2022 by Lakshman Bhaiya go_editor 13.8k points 296 views answer comment Share See all 0 reply Please log in or register to add a comment.