anonymous
  • anonymous
Solve. 2x2 + x – 1 = 9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
let me post the answer choices!
anonymous
  • anonymous
Do you me 2^2?
pooja195
  • pooja195
subtract the 9 so we have the equation = to 0 \[\huge 2x^2+x-10\] them multiply a*c |dw:1433014431435:dw| factor it out the factors are 5 and -4 they add to 1 and multiply to -20

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More answers

pooja195
  • pooja195
(x+5)=0 (x-4)=0
pooja195
  • pooja195
then just solve the equations :) x+5=0 x-4=0
mathmate
  • mathmate
Faster than the answer choices!
anonymous
  • anonymous
the answer is 6
anonymous
  • anonymous
|dw:1433014411133:dw|
pooja195
  • pooja195
@pflorido explain your answer
anonymous
  • anonymous
i just posted the choices!
pooja195
  • pooja195
@ninowletonzalez06 your answer choices are hard to read :/
anonymous
  • anonymous
if you have trouble tell me which one to do again!:)
pooja195
  • pooja195
they dont match up with my work .-. thats weird :/ solve this see if they match up :/ x+5=0 x-4=0
mathmate
  • mathmate
2x^2+5x-4x-10=0 x(2x+5)-2(2x+5)=0 (x-2)(2x+5)=0 so x=2 or x=-5/2
mathmate
  • mathmate
It's one step more when the coefficient of x^2 is not one!
anonymous
  • anonymous
so c?
pooja195
  • pooja195
oh lol i missed a step oops sorry! >_< yeah @mathmate has the work :) and yes its C :)

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