If there is no XY term in the polynomial 8x & # 178; + mxy-5y & # 178; + XY-8, then the value of M is

If there is no XY term in the polynomial 8x & # 178; + mxy-5y & # 178; + XY-8, then the value of M is

8x²+mxy-5y²+xy-8
=8x²+(m+1)xy-5y²-8
Because there is no XY term
therefore
m+1=0
m=-1
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