Question

If the roots the equation ax²+2bx+c=0 and bx²-2√(cax) +b=0 are simultaneously real,then prove that b²-ac

Answer 1

=> given that the roots of these two equations are real. Hence D≥0 i.e, (b²-4ac≥0)

Given that the roots of (1) and (2) are simultaneously real hence equation (3) equation (4)​