List all the factors of \(-6z\). (2 marks)
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\( 1\ ,\ 2\ ,\ 3\ ,\ 6\ ,-z\ ,-2z \ ,-3z\ ,-6z\)
\( -1\ , -2\ , -3\ , -6\ ,\ z\ ,\ 2z \ ,\ 3z\ ,\ 6z\)
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\(\text{Listing factors in pairs}\)
\((1\ ,-6z) (2\ ,-3z) (3\ ,-2z) (6\ ,-z)\)
\((-1 ,\ 6z) (-2 , 3z) (-3 ,\ 2z) (-6 , z)\)
\(\therefore\ \text{Factors are:}\)
\( 1\ ,\ 2\ ,\ 3\ ,\ 6\ ,-z\ ,-2z \ ,-3z\ ,-6z\)
\( -1\ , -2\ , -3\ , -6\ ,\ z\ ,\ 2z \ ,\ 3z\ ,\ 6z\)