What is the completely factored form of t^4 − 16

Since both terms are perfect squares, factor using the difference of squares formula, a^ 2  −  b ^2  =  ( a  +  b)  ( a − b )  where  a  =  t ^2 and  b  =  4 .

( t^ 2  +  4 )  (  t  +  2 )  (  t  −  2 )  

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what i would say the best answer is a. 40.5

sas (side angle side)

aa (angle angle)

sss(side side side)

sas find two sides with an angle in between

aa is finding two angles and the third will add up to 180

sss find all sides

step-by-step explanation: