25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=
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25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=
25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=
25(x+y)^2+16(x-y)^2=
4y(y-x)^2-6y(x-y)^3=
(a-2b)^2+(a-2b)+1/4=
25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=
1
25(x+y)^2+16(x-y)^2
=25(x^+2xy+y^)+16(x^-2xy+y^)
=25x^+50xy+25y^+16x^-32xy+16y^
=41x^+18xy+41y^
2
4y(y-x)^2-6y(x-y)^3
=4y(y^-2xy+x^)-6y(x^3-3x^y+3xy^-y^3)
=4y^3-8xy^+4x^y-6x^3y+18x^y^-18xy^3+6y^4
3
(a-2b)^2+(a-2b)+1/4
=a^-4ab+4b^+a-2b+1/4
1、 =25(x^2+2xy+y^2)+16(x^2-2xy+y^2)
=25x^2+50xy+25y^2+16x^2-32xy+16y^2
=41x^2+18xy+41y^2
25xx+50xy+25yy+16xx-32xy+16yy
41xx+18xy+41yy
4yyy-8yxy+4yxx-(6y[xxx-3xxy+3xyy-yyy])
4yyy-8xyy+4xxy-6xxxy+18xxyy-18xyyy+6yyyy
aa-4ab+4bb+a-2b+1/4
看得懂吧
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