anonymous
  • anonymous
so i need to solve this equation by useing the square root property 4x^2-28x+49=5
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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asnaseer
  • asnaseer
you should be able to factorise the left hand side of this equation
anonymous
  • anonymous
yes but the factors have to add to = 28
asnaseer
  • asnaseer
correct

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asnaseer
  • asnaseer
are you stuck in the factorisation process?
asnaseer
  • asnaseer
you need to end up with something like:\[(...)^2=5\]so see if you can factorise the left hand side such that it becomes something squared, i.e.:\[4x^2-28x+49=(...)^2\]
asnaseer
  • asnaseer
the first term is \(4x^2\) and the term involving x is negative, so we know it must be of the form:\[(2x-???)^2\]
asnaseer
  • asnaseer
does any of this make sense?
anonymous
  • anonymous
yes thank you
asnaseer
  • asnaseer
ok - so can you see how to factorise the left hand side now?
anonymous
  • anonymous
yes
asnaseer
  • asnaseer
good - so you know how to solve this equation now?
anonymous
  • anonymous
yes

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