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 2 years ago
Pleaseeee help, Grade 12!
If x^3  4x^2 +kx =0
what value of k would result in two equal roots?
 2 years ago
Pleaseeee help, Grade 12! If x^3  4x^2 +kx =0 what value of k would result in two equal roots?

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josiahh
 2 years ago
Best ResponseYou've already chosen the best response.2x(x^24x+k)=0 164k=0 so k=4

pottersheep
 2 years ago
Best ResponseYou've already chosen the best response.0sorry where did 16 4k come from?

josiahh
 2 years ago
Best ResponseYou've already chosen the best response.2bsqrt(b^24ac)... that formula. so b^24ac=4^24k. as you can see, you can factor out an x to get a quadratic equation, use the quadratic formula to solve that equation and there you go :)
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