If the expression x2−(5m−2)x+4m2+10m+25 can  be expressed as a perfect square, then m=

x2−(5m−2)x+4m2+10m+25 can be expressed as a  perfect square. ∴  Discriminant =0∴    (5m−2)2−44m2+10m+25=0∴    9m2−60m−96=0∴    3m2−20m−32=0∴    (3m+4)(m−8)=0∴    m=−4/3,8