P puzzled01 New member Joined Jun 15, 2007 Messages 12 Jun 29, 2007 #1 Please help on this on too. -9x^4+9x^2

S soroban Elite Member Joined Jan 28, 2005 Messages 5,588 Jun 29, 2007 #2 Hello, puzzled01! Please help on this on too: \(\displaystyle \:-9x^4\,+\,9x^2\) Click to expand... \(\displaystyle \text{Factor out }-9x^2:\;\;-9x^2\underbrace{(x^2\,-\,1)}_{\text{diff. of squares}}\) Answer: \(\displaystyle \:-9x^2(x\,-\,1)(x\,+\,1)\)

Hello, puzzled01! Please help on this on too: \(\displaystyle \:-9x^4\,+\,9x^2\) Click to expand... \(\displaystyle \text{Factor out }-9x^2:\;\;-9x^2\underbrace{(x^2\,-\,1)}_{\text{diff. of squares}}\) Answer: \(\displaystyle \:-9x^2(x\,-\,1)(x\,+\,1)\)