若2x^kY^k+2与3x²Y^n的和是5x²Y^n,则k=_,n=_.若a+b=-2,则4a+4b-1的值为_____.

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若2x^kY^k+2与3x²Y^n的和是5x²Y^n,则k=_____,n=_______.若a+b=-2,则4a+4b-1的值为_______.
若2x^kY^k+2与3x²Y^n的和是5x²Y^n,则k=_____,n=_______.若a+b=-2,则4a+4b-1的值为_______.

若2x^kY^k+2与3x²Y^n的和是5x²Y^n,则k=_____,n=_______.若a+b=-2,则4a+4b-1的值为_______.
1.若2x^kY^(k+2)与3x²Y^n的和是5x²Y^n,则k=2,n=4.
2.若a+b=-2,则4a+4b-1的值为4*(-2)-1=-9.