Zoey1999
Zoey1999 Zoey1999
  • 05-02-2015
  • Mathematics
Answered

Simplify 2x^2 - y for x = 3 and y = -2.

*20
*14
*16
*10
Please help, also can you explain it if you can?



Answer :

naǫ
naǫ naǫ
  • 05-02-2015
[tex]x=3 \\ y=-2 \\ \\ \hbox{plug the values into the expression:} \\ 2x^2-y=2 \times 3^2-(-2)=2 \times 9 +2=18+2=\boxed{20}[/tex]
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