How do you factor 5x^4- 5x^2

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asked Oct 22, 2018 157k views

1 Answer

Jayant · Answer 1 · 2018-10-27T01:13:09+0000

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)

How do you factor 5x^4- 5x^2

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