Zoey1999 Zoey1999

05-02-2015
Mathematics

contestada

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

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

Respuesta :

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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