anonymous
  • anonymous
Will give medal, please help!!!! How do I solve (k-7)^2 +6(k-7)+10 using the quadratic formula?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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FortyTheRapper
  • FortyTheRapper
I would first distribute and then combine like terms After that, we can use the quadratic formula
anonymous
  • anonymous
okay but the answer is supposed to be 4 plus or minus imaginary i
anonymous
  • anonymous
I tried using the substitution method but got a completely different answer

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ParthKohli
  • ParthKohli
hmm, I'm getting that. so you substituted \(x = k -7\) and got a quadratic in \(x\).
anonymous
  • anonymous
yes
ParthKohli
  • ParthKohli
\[x^2 + 6x + 10\]did you use the quadratic formula for this?
anonymous
  • anonymous
when I substituted I got the x^2 +6x +10=0
anonymous
  • anonymous
Then used that equation in the quadratic formula
ParthKohli
  • ParthKohli
You should get \(x = -3 \pm i\). But remember that is not \(k\).
anonymous
  • anonymous
But what do you do with that -3 plus or minus imaginary i then?
ParthKohli
  • ParthKohli
You use \(x = k-7\) again.
ParthKohli
  • ParthKohli
\[\Rightarrow k-7 = -3 \pm i\]
anonymous
  • anonymous
Okay I got it thankyou
ParthKohli
  • ParthKohli
No problem. :)

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