frances8049 frances8049

02-02-2015
Mathematics

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If x = –1 and y = 2, what is the value of the expression 2x3 – 3xy ?

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02-02-2015

[tex]x=-1, \ y=2 \\ \\ 2x^3-3xy=2 \times (-1)^3-3 \times (-1) \times 2=2 \times (-1) +6=-2+6=4[/tex]

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