anonymous
  • anonymous
How would you simplify (2x^2 - 9)?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
(xsqrt2+3)(xsqrt2-3)
anonymous
  • anonymous
(x^2 + 3) (x^2 - 3) but then you'd have x^4?
anonymous
  • anonymous
|dw:1327557774107:dw|

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anonymous
  • anonymous
Because I have to find the 0s of a solution, and the original problem is 4x^4 - 18x^2 = 0 I took out 2x^2(2x^2-9)=0, then now I'm stuck..
anonymous
  • anonymous
is there a certain way you need to solve it? Such as:factoring, quadratic formula, completing the square, etc. ?
anonymous
  • anonymous
4x^2-9 (2sqrtx-3)(2sqrtx=3)
anonymous
  • anonymous
there isn't any specified, they just want us to find the 0s, but with that Oindrilla, how would I find the 0s?
anonymous
  • anonymous
|dw:1327558063247:dw|
anonymous
  • anonymous
oh true sorry
anonymous
  • anonymous
oh meant to right = instead of + by the way srry
anonymous
  • anonymous
shinigami.. how does that work though? to find the 0s because I'd have to find the square of 2 wouldn't I?
anonymous
  • anonymous
try the quadratic formula
anonymous
  • anonymous
|dw:1327558211920:dw|

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