问题标题:
一,计算1,(X+Y/2)^2+(X-Y/2)^22,(7A-B-1)(7A+B-1)二,已知A+B=5,AB=-6,求下列各式的值1,A^2+B^22,A^2-AB+B^2三,计算(-12X^3*Y^4*Z)/(-4X^2*Y^3*Z)(-1/4*A^6*B^4*C)/(2*A^3*C)(2M^N+1)/(8M^2N+1)6(A-B)^5/1/3(A-B)^2(3A)^3*B^2/(8B^3*B^2)3A^M+1*B^B+1/(-
问题描述:

一,计算

1,(X+Y/2)^2+(X-Y/2)^2

2,(7A-B-1)(7A+B-1)

二,已知A+B=5,AB=-6,求下列各式的值

1,A^2+B^2

2,A^2-AB+B^2

三,计算

(-12X^3*Y^4*Z)/(-4X^2*Y^3*Z)

(-1/4*A^6*B^4*C)/(2*A^3*C)

(2M^N+1)/(8M^2N+1)

6(A-B)^5/1/3(A-B)^2

(3A)^3*B^2/(8B^3*B^2)

3A^M+1*B^B+1/(-1/3A^MB^N-20*(1/9B)^2

-1/8A^5*B^4*C^2/(4B^2*B)

5(X-Y)^5/1/5(X-Y)^2

[X(X+1)+X^2*(X-1)]/(-3X)

[(M+N-P)(M+P+N)-(M+N)^2]/(-P)

就这些拉,要正确,

刘一武回答:
  一,计算   1,(X+Y/2)^2+(X-Y/2)^2   =2X^2+0.5Y^2   2,(7A-B-1)(7A+B-1)   =49A^2-14A+1-B^2   二,已知A+B=5,AB=-6,求下列各式的值   1,A^2+B^2   =(A+B)^2-2AB=25+12=37   2,A^2-AB+B^2   =(A+B)^2-3AB=25+18=43   三,计算   (-12X^3*Y^4*Z)/(-4X^2*Y^3*Z)   =3XY   (-1/4*A^6*B^4*C)/(2*A^3*C)   =-1/8*A^3*B^4   (2M^N+1)/(8M^2N+1)   题目错了   6(A-B)^5/1/3(A-B)^2   =18(A-B)^3   (3A)^3*B^2/(8B^3*B^2)   =27/8   3A^M+1*B^B+1/(-1/3A^MB^N-20*(1/9B)^2   有错   -1/8A^5*B^4*C^2/(4B^2*B)   =-1/32*A^5*B*C^2   5(X-Y)^5/1/5(X-Y)^2   =25(X-Y)^3   [X(X+1)+X^2*(X-1)]/(-3X)   =-(1+X^2)/3   [(M+N-P)(M+P+N)-(M+N)^2]/(-P)   =P
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