Destinyyyy
  • Destinyyyy
Can someone please help me with these last 5 problems? Ive been working on this all day.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Destinyyyy
  • Destinyyyy
Solve using appropriate substitution. (x^2 -6x)^2 -11(x^2 -6x) -30=0
Destinyyyy
  • Destinyyyy
Im at the end where I factor for the second time
Destinyyyy
  • Destinyyyy
x^2 -6x-5=0 x^2 -6x-6=0

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Destinyyyy
  • Destinyyyy
(x-1)(x-5)=0 I cant seem to factor the second one.. I dont get why
tkhunny
  • tkhunny
Have you met the "Discriminant"? \((-6)^{2} - 4(1)(-5) = 36 + 20 = 56\) 56 is not a perfect square. You will not be able to factor it. Your factorization is not correct. \((-6)^{2} - 4(1)(-6) = 36 + 24 = 60\) 60 is not a perfect square. You will not be able to factor it.
Destinyyyy
  • Destinyyyy
????
Destinyyyy
  • Destinyyyy
Where are you getting all that from?
Destinyyyy
  • Destinyyyy
@freckles
tkhunny
  • tkhunny
You didn't answer my first question. If you have not met the "Discriminant", that will not make much sense. Anyway, (x-1)(x-5) = x^2 - 6x + 5 -- The sign on the constant term is not correct as you have it factored. Have you encountered ANY situation where things cannot be factored? There are other ways to proceed when factoring fails.
Destinyyyy
  • Destinyyyy
I have in the last section the other day..
Destinyyyy
  • Destinyyyy
Yes but all my previous examples and help from people have only factored so I didnt think I was allowed to do a different way
tkhunny
  • tkhunny
Well, we're stuck on these. They can't be factored. I hope the assignment was not meant just to frustrate you. It's time to pull out the Quadratic Formula or "Completing the Square" or anything else you have in your experience.
Destinyyyy
  • Destinyyyy
Okay
Destinyyyy
  • Destinyyyy
3+- square root 15
Destinyyyy
  • Destinyyyy
3+- square root 14
Destinyyyy
  • Destinyyyy
My answers are wrong.
Destinyyyy
  • Destinyyyy
@IrishBoy123
tkhunny
  • tkhunny
Since you haven't told us what the question is, it's pretty tough to help you with that. You also haven't shown your work.

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