find the linear factors of
a) 6z^2 - z^2 - 2z
b) z^4 -6z^2 +5 find the linear factors of
a) 6z^2 - z^2 - 2z
b) z^4 -6z^2 +5 @Mathematics

Question

find the linear factors of 
a) 6z^2 - z^2 - 2z
b) z^4 -6z^2 +5 find the linear factors of 
a) 6z^2 - z^2 - 2z
b) z^4 -6z^2 +5 @Mathematics

anonymous · Answer

a) z(5z - 2)

anonymous · Answer

Working on the second answer....

anonymous · Answer

Do you think you should use the method for factorising  a quadratic expression?

anonymous · Answer

yeahh !

anonymous · Answer

Oh yeah, got the answer - 
b) (z^2 - 5)(z^2 - 1)

anonymous · Answer

Hope my answer was useful. Want to know the workings?

anonymous · Answer

yahh i would like to know the workings! hahah! >D thank you so much !

anonymous · Answer

a) 6z^2 - z^2 - 2z
= 5z^2 - 2z
Take common factor(z).
z(5z - 2)
b) z^4 - 6z^2 + 5
Sum = -6
Product = 5
z^4 - z^2 - 5z^2 + 5
= z^2(z^2 - 1) - 5(z^2 - 1)
= (z^2 - 5)(z^2 - 1)

anonymous · Answer

Oh, come on, no medals?? And I took so much effort in typing out that answer!!

anonymous · Answer

Ah, that's better.