1.若X^2-y^2=4则(x+y)^2(x-y)^2的值是?2.定义一种新运算,其法则为a△b=ab-a+b,则（a-b）△（a+b）=?3.若单项式-2a^3b^m与单项式3a^n+1*b的差仍为单项式,则(m-n)^2011=?4.已知x+2y-3=0,则代数式2^2x*16^y-5的值是

Question

1.若 X^2-y^2=4 则(x+y)^2(x-y)^2的值是?
2.定义一种新运算,其法则为a△b=ab-a+b,则（a-b）△（a+b）=?
3.若单项式-2a^3b^m与单项式3a^n+1 * b的差仍为单项式,则(m-n)^2011=?
4.已知x+2y-3=0,则代数式2^2x*16^y-5的值是多少?

Answer 1

1.若 X^2-y^2=4 则(x+y)^2(x-y)^2的值是?
(x+y)^2(x-y)^2
=[(x+y)(x-y)]²=16
2.定义一种新运算,其法则为a△b=ab-a+b,则（a-b）△（a+b）=
（a-b）△（a+b）=(a-b)(a+b)-(a-b)+(a+b)=a²-b²+2b
3.若单项式-2a^3b^m与单项式3a^n+1 * b的差仍为单项式,则(m-n)^2011=?
n+1=3
m=1
n=2 m=1
(m-n)^2011=(1-2)^2011=-1
4.已知x+2y-3=0,则代数式2^2x*16^y-5的值是多少?
2^(2x+4y)-5
=2^6-5
=64-5=59