polynomial Question (1 Viewer)

[mike12345678]

can someone help me please.i cant seem to do this ploynomial question.
i) reuce this to linear factors.
3x^3+3x^2-x-1
ii) hence solve the following equation 3tan^3@+3tan^2@-tan@-1=0
@=theta or alpha...

 

[D94]

You can factorize a out of the first two terms, so you're going to get:


Now factorize a out of the two expressions:

which equals (by difference of two squares in the second bracket)


For the second part, if you compare the two equations, we can let and solve each part by letting it equal zero.