Attachment 25657

I don't understand what is going on in the pink area. Can someone explain this?

thanks

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- Nov 11th 2012, 04:25 PMkingsolomonsgravesolving for x with multiple exponents higher than 2
Attachment 25657

I don't understand what is going on in the pink area. Can someone explain this?

thanks - Nov 11th 2012, 05:13 PMskeeterRe: solving for x with multiple exponents higher than 2
it's just factoring ...

$\displaystyle 8(x+3)^7 (x-5)^4 + 4(x+3)^8(x-5)^3 = 0$

note the two terms have $\displaystyle 4(x+3)^7$ and $\displaystyle (x-5)^3$ in common. factor them out ...

$\displaystyle 4(x+3)^7(x-5)^3[2(x-5) + (x+3)] = 0$ - Nov 11th 2012, 05:21 PMkingsolomonsgraveRe: solving for x with multiple exponents higher than 2
oh I see now. ok thanks!