Polynomial Problem (1 Viewer)

[swdbf]

hello..

any help would be greatly appreciated.

If two of the roots of the equation are equal, show that .

 

[Timothy.Siu]

just differentiate it, find the double root, and sub it back into the original equation and you'll get it

 

[swdbf]

just differentiate it, find the double root, and sub it back into the original equation and you'll get it

Uh we haven't done calculus yet at school, would you have any idea on doing it with just normal algebra?

 

[Fortify]

Holy ~

A 13'er doing a 3U question :S

 

[swdbf]

Holy ~

A 13'er doing a 3U question :S

nah i just entered a random HSC year

 

[study-freak]

 

[Fortify]

nah i just entered a random HSC year

That explains alot hahas !

 

[swdbf]

wow..

thx

if you don't mind, can you show me the steps using calculus as well?

 

[jet]

 

[tommykins]

 

[jet]

I just took the +ve but it doesnt really matter. Squaring it removes it anyway. Just so the OP knows.

 

[study-freak]

 

[tommykins]

I just took the +ve but it doesnt really matter. Squaring it removes it anyway. Just so the OP knows.

More technically correct seeing as the double root can be negative or positive.

 

[swdbf]

Thanks all..

uh kind of stuck on another poly question...


Solve the equation given that the product of two of the roots is equal to the product of the other two.

 

[jet]

More technically correct seeing as the double root can be negative or positive.

Exactly, but I'm lazy lol.