Answer:
[tex]-3x^2+11xy-8y^2[/tex]
Step-by-step explanation:
Use the FOIL method
F - means First term
[tex](-3x)(x)=-3x^2[/tex]
OI - means Outer and Inner term
O [tex]= (-3x)(-y)=3xy[/tex]
I [tex]= (8y)(x)=8xy\\[/tex]
Then combine
[tex]3xy+8xy=11xy[/tex]
L - means Last term
[tex](8y)(-y)=-8y^2[/tex]
Lastly, combine all the terms
[tex]-3x^2+11xy-8y^2[/tex]
