How do you factor $t^4-t^2$ completely?

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Answer 1 · 2018-08-06T15:33:24

$t^2(t-1)(t+1)$

$"take out a "color(blue)"common factor "t^2$

$=t^2(t^2-1)$

$t^2-1color(blue)" is a difference of squares"$

$=t^2(t-1)(t+1)$

How do you factor t^4-t^2t^4-t^2 completely?