graceomambia2001 graceomambia2001

09-08-2019
Mathematics

contestada

What is the value of the expression 2x2 + 3xy – 4y2 when x = 2 and y = –4?

Respuesta :

meredith48034 meredith48034

11-08-2019

Answer:

-80

Step-by-step explanation:

2(2)^2+3(2)(-4)-4(-4)^2

2(4)+3(-8)-4(16)

8-24-64

-16-64

-80

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