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Mathematics 30 Online
OpenStudy (anonymous):

Multiply (6z² - 4z + 1)(8 - 3z).

OpenStudy (sandra):

the basic rule here is you have multiply each part in the first parens by each part in the second parens, and then add them all up

OpenStudy (sandra):

so (6z^2 - 4z + 1) (8 - 3z) = (6z^2 x 8) + (6z^2 x -3z) + (-4z x 8) + (-4z x -3z) + (1 x 8) + (1 x -3z)

OpenStudy (sandra):

48z^2 - 18z^3 - 32z + 12z +8 -3z

OpenStudy (sandra):

48z^2 - 18z^3 - 32z + 12z^2 +8 -3z

OpenStudy (sandra):

now combine like terms and you have the answer

OpenStudy (anonymous):

so is it 6z-7z +9?

OpenStudy (sandra):

well - z^2, z^3, and z are not like terms

OpenStudy (sandra):

-18z^3 + 60z^2 -35z + 8

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