find the nature of root for 2x^2+5x+5=0
Answers
Answered by
42
2x²+5x+5 = 0
D = b²-4ac
here b=5
a=2,c=5
so
D = 25-40
=> -15
so roots will be imaginary
D = b²-4ac
here b=5
a=2,c=5
so
D = 25-40
=> -15
so roots will be imaginary
Answered by
23
it is imaginary.
in the equation...
a=2
b=5
c=5
Find the discriminant of this quadratic equation.
b²-4ac
=5²-4(2)(5)
=25-40
= -15
in these situation:-
If D>1 - it has 2 different real roots.
If D=1 - it has 2 equal real roots
if D<1 - it has imaginary roots
So therefore it has imaginary roots
in the equation...
a=2
b=5
c=5
Find the discriminant of this quadratic equation.
b²-4ac
=5²-4(2)(5)
=25-40
= -15
in these situation:-
If D>1 - it has 2 different real roots.
If D=1 - it has 2 equal real roots
if D<1 - it has imaginary roots
So therefore it has imaginary roots
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