anonymous
  • anonymous
Find the zero : y=36x^2+36x+9 Ugh how to solve this one. :"(
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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zpupster
  • zpupster
try and reduce it first div by 9
anonymous
  • anonymous
so 4x+4+1?
zpupster
  • zpupster
not quite 4x^2 + 4x +1 now factor

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anonymous
  • anonymous
ah i don't know how to factor that
anonymous
  • anonymous
What is the common factor?
anonymous
  • anonymous
And highest.
anonymous
  • anonymous
2 and 4?
zpupster
  • zpupster
ok I will show you one wayS: (2x )(2x ) first term mult = 4x^2 (2x 1 )(2x 1 ) our last term is +1 it (-1)(-1) or(1) (1) we know our middle term is 4x=2x+2x we get this by mult outside terms and inside terms so (2x+1)(2x+1) is our factor
anonymous
  • anonymous
is there any shortcut method
anonymous
  • anonymous
i can't understand that one. how'd u got 2x?
zpupster
  • zpupster
well if you have x^2 you can see it is x times x 4x^2 = 2x
anonymous
  • anonymous
how about the remaining 4x+1 ?
zpupster
  • zpupster
I am using the Foil method in reverse multiply the first outside inside last so I have to figure out the first terms 2x times 2x is a good bet because it equals 4x^2
anonymous
  • anonymous
oh okaaay thanks a lot
zpupster
  • zpupster
did you get how to find the zero
anonymous
  • anonymous
-1/2 ?
anonymous
  • anonymous
is that correct?
lncognlto
  • lncognlto
Yes, if 2x+1 = 0, then x = -1/2
lncognlto
  • lncognlto
@MCath
zpupster
  • zpupster
good job

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