Each of the equations 3x^2\minus{}2\equal{}25, (2x\minus{}1)^2\equal{}(x\minus{}1)^2, \sqrt{x^2\minus{}7}\equal{}\sqrt{x\minus{}1} has:
<spanclass=′latex−bold′>(A)</span>two integral roots<spanclass=′latex−bold′>(B)</span>no root greater than 3<spanclass=′latex−bold′>(C)</span>no root zero<spanclass=′latex−bold′>(D)</span>only one root<spanclass=′latex−bold′>(E)</span>one negative root and one positive root