Question 252911
Here is the original equation:
{{{2x^2 + 3xy - 4y^2}}} 
Let: x = 2 and y = -4
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step 1: replace x with 2 and y with -4 to get
{{{2*(2)^2+3(2)(-4)-4*(-4)^2}}}
use order of operations to simplify:
{{{2*4 + 3(-8) - 4(16)}}}
{{{8 - 24 - 64}}}
{{{-16 - 64}}}
{{{-80}}}