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Quadratic Equation

The quadratic equation x2+(m+4)x+(4m+1)=0 x^2 + (m+4)x + (4m+1)=0 , where m is a constant, has equal roots.

Show that m^2 -8m + 12=0


Anybody? :smile:
Reply 1
Avatar for Notnek
Notnek
21
Original post by Nilsdejongh
The quadratic equation x2+(m+4)x+(4m+1)=0 x^2 + (m+4)x + (4m+1)=0 , where m is a constant, has equal roots.

Show that m^2 -8m + 12=0



Anybody? :smile:
What do you know about the discriminant of a quadratic and equal roots?
Reply 2
Avatar for me2*
me2*
13
Original post by Nilsdejongh
The quadratic equation x2+(m+4)x+(4m+1)=0 x^2 + (m+4)x + (4m+1)=0 , where m is a constant, has equal roots.

Show that m^2 -8m + 12=0



Anybody? :smile:


do b^2 - 4ac = 0

where b=(m+4)
where a=1
where c=(4m+1)

:biggrin::biggrin:
Reply 3
Avatar for Krollo
Krollo
17
Original post by me2*
do b^2 - 4ac = 0

where b=(m+4)
where a=1
where c=(4m+1)

:biggrin::biggrin:


Looks good to me.

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