anonymous
  • anonymous
Solve. x2 – 8x + 4 = 0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
i am going to post the answer choices!:)
pooja195
  • pooja195
what multiplies to 4 and adds up to -8?
anonymous
  • anonymous
4?

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More answers

pooja195
  • pooja195
AND?
anonymous
  • anonymous
-4?
pooja195
  • pooja195
no
anonymous
  • anonymous
um 2
pooja195
  • pooja195
-4 and 2 are right lol sorry for caps >_< (x-4)(x+2) Solve
anonymous
  • anonymous
4 and -2
pooja195
  • pooja195
Good :)
anonymous
  • anonymous
|dw:1433024849017:dw|
anonymous
  • anonymous
@pooja195 these are he answer choices!
pooja195
  • pooja195
>_< GRRR!!! they want the quadratic formula TTT_TT
pooja195
  • pooja195
ok B) what are the a b c values? :)
anonymous
  • anonymous
x^2 8 and 4
pooja195
  • pooja195
fair enough a=1 b=8 c=4 \[\huge~x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a } \]
pooja195
  • pooja195
\[\huge~x=\frac{ -(8)\pm \sqrt{(8)^2-4(1)(4)} }{ 2(4) }\]
anonymous
  • anonymous
okay!
pooja195
  • pooja195
eh it looks overwhelming :/ (8)^2−4(1)(4)=?
anonymous
  • anonymous
48?
anonymous
  • anonymous
@pooja195
pooja195
  • pooja195
\[\huge~x=\frac{ -8 \pm \sqrt{48} }{ 2}\]
pooja195
  • pooja195
@jagr2713 how do i finsih this?
anonymous
  • anonymous
@jagr2713
pooja195
  • pooja195
@TheSmartOne !!!!!
anonymous
  • anonymous
@danial.sheikh
pooja195
  • pooja195
@mathmate T_T
anonymous
  • anonymous
wait
geerky42
  • geerky42
HINT: \(48 = 16\cdot3\)
geerky42
  • geerky42
@pooja195
mathmate
  • mathmate
\(\huge~x=\frac{ -(-8) \pm \sqrt{48} }{ 2}\)
mathmate
  • mathmate
which simplifies to: \(\huge~x=4 \pm 2\sqrt{3} \) using \(\large \sqrt{a^2b}=a\sqrt b\)
anonymous
  • anonymous
@pooja195 so what is the next step?
pooja195
  • pooja195
Look at what @mathmate showed u .-.
anonymous
  • anonymous
okay!
anonymous
  • anonymous
so A?
pooja195
  • pooja195
go_od job :) it is A

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