factor -9x^4+9x^2

puzzled01

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Jun 15, 2007
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Please help on this on too. -9x^4+9x^2
 

soroban

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Jan 28, 2005
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Hello, puzzled01!

Please help on this on too: \(\displaystyle \:-9x^4\,+\,9x^2\)

\(\displaystyle \text{Factor out }-9x^2:\;\;-9x^2\underbrace{(x^2\,-\,1)}_{\text{diff. of squares}}\)

Answer: \(\displaystyle \:-9x^2(x\,-\,1)(x\,+\,1)\)

 

puzzled01

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Jun 15, 2007
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thank you
 
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