factoring polynomials

Algebra
Tutor: None Selected Time limit: 1 Day

-28z^3+16z^2+80z

Aug 25th, 2014

-28z^3+16z^2+80z

= z(-28z^2+16z+80)

 = z (-28z^2+56z-40z+80)

= z[ 14z(-2z+4) +20(-2z+4)]

= z(14z+20)(-2z+4)

Aug 25th, 2014

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