The value of 'x' for which (7.6)(7.6) + 7.6x + (0.9)(0.9) is a perfect square is
18
180
1.8
0.18
0.018
(7.6)(7.6)+7.6x+(0.9)(0.9)=(7.6+0.9)2∴x=2×0.9=1.8