9. Find the values of k for which the given equation has real and equal roots: 2x-2-10x+k=0.
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eqn=2x^2-10x+k=0
if he equation has real and equal roots
so
eqn2= b^2-4ac=0
here
a=2 ; b= -10 ; c = k. from the eqn
putting the values in eqn2
(-10)^2-4(2)(k)=0
by solving the eqn
you will get
k=25/2
if he equation has real and equal roots
so
eqn2= b^2-4ac=0
here
a=2 ; b= -10 ; c = k. from the eqn
putting the values in eqn2
(-10)^2-4(2)(k)=0
by solving the eqn
you will get
k=25/2
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