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Re: How do I do this???
Posted:
Jan 24, 2005 2:19 AM


Stephanie wrote: > > How the heck do I multiply these together?? > > (x  .5) (x  7.8) (x  8.7) ??? PLEASE HELP!
In two stages so that nothing gets lost:
(x  .5)*(x  7.8) = x^2  7.8*x .5*x + 3.9
= x^2  8.3*x + 3.9
And then:
(x^2  8.3*x + 3.9)*(x  8.7)
= x^3  8.7*x^2  8.3*x^2 + 72.21*x + 3.9*x  33.93
= x^3  17*x^2 + 76.11*x  33.93
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