thanks. how about this?
factor completely
y^2(x^4-z^4) - x^2(y^4-z^4) +z^2(y^4-x^4)
i really have a hard time in factoring long expressions. is there any technique? thanks
You started with
In the above, you multiplied everything out to get:
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There appear to be some steps missing between the above and your next step:
I think you regrouped and then factored out of pairs of terms, as:
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Then you factored the difference of squares in the last set of parentheses above, and factored " " out front:
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. . . . .
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You then paired and factored inside the second parentheses:
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. . . . .
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Then you factored the differences of squares:
. . . . .
This wasn't the factored form I'd expected, but it looks to be correct. Good job!