Respuesta :

Astronomy541
(6x^2 + 4xy + 2y^2) + (4x^2 - 2xy - 3y^2)
=
(10x^2 + 4xy - y^2)

Kendall assumed the 2y^2 was negative and not positive leading her to create the error of -5y^2

Hope this helps :)

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