anonymous
  • anonymous
help pls Multiply and Simplify (z3-64) / (z2-5z+4) * (2z2+9z-11) / (5z2+20z+80)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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dumbcow
  • dumbcow
try to factor each part, then you can cancel
dumbcow
  • dumbcow
\[z^{3}-64 = z^{3} -4^{3} = (z-4)(z^{2}+4z+16)\] \[z^{2}-5z+4 = (z-4)(z-1)\] \[2z^{2}+9z-11 = (2z+11)(z-1)\] \[5z^{2}+20z+80 = 5(z^{2}+4z+16)\]
anonymous
  • anonymous
so then do I cancel out the ones that are the same

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dumbcow
  • dumbcow
yes since you are multiplying, if same term is both on top and bottom they cancel
anonymous
  • anonymous
leaving (2z+11) / 5
dumbcow
  • dumbcow
correct
anonymous
  • anonymous
woo hoo thank you
dumbcow
  • dumbcow
:)

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