masonorourke masonorourke

30-01-2019
Mathematics

contestada

PLEASE ANSWER!!

if x = -3 and y = 5, what is the value of the expression x^2 + 2xy?
A. -1
B. 39
C. -14
D. -21
E. -39

Respuesta :

AKSTEELE AKSTEELE

30-01-2019

D
[tex] {x}^{2} + 2xy \\ { ( - 3)}^{2} + 2( - 3)(5) \\ 9 + 2( - 15) \\ 9 + ( - 30) \\ - 21[/tex]

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