laylajewel6502
laylajewel6502
05-04-2017
Mathematics
contestada
how do you factor 5x^4- 5x^2
Respuesta :
irspow
irspow
05-04-2017
The greatest common factor is 5x^2 so:
5x^2(x^2-1) (now notice that the parenthetical term is the difference of perfect squares)
The rule for factoring difference of squares is: a^2-b^2=(a-b)(a+b) so:
5x^2(x+1)(x-1)
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