Question

Q.5 Show that real roots of the quadratic equation x2 + 2x + 9 = 0 do not exist.
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Answer 1

x²+2x+9=0

a=1+b=2c=9

D=√b²-4ac

D= √4²-4*1*9

=√16-36=√-20

since √-20 is imaginary number quadratic eqn doesn't have a real root