超多數學功課問題！！！(20分)

21. (w)(w)+(y)(y)
=w^2+y^2
22. (y)(y)(y)(4)+(8)(y)( y)
=4y^3+8y^2
23. (w)(w)(w)(12)-(4)(w) (w)(w)
=12w^3-4w^3
=8e^3
24. (w)(w)(y)(y)
=w^2y^2
25. (2)(w)(y)(w)+(5)(y)( w)(y)
=2w^2y+5wy^2
26. (2)(w)(y)+(3)(y)(w)
=5wy
27. (6)(w)(y)+(7)(y)(w)
=13wy
28. (12)(w)(y)(y)-(3)(y) (y)(w)
=9wy^2
29. (w)(w)(3)-(4)(w)(w)( w)
=3w^2-4w^3
30. (6)(w)(y)(w)-(4)(y)( y)
6w^2y-4y^2

21. =w^2 + y^2
22. y^3 x 4 + y^2 x8
=4y^3 + 8y^2
23. w^3 x 12 - 4 x w^3
=12w^3 - 4w^3
=8w^3
24. =w^2 y^2
25. 2 x yw^2 + 5 x wy^2
=2yw^2 + 5y^2 w
26. =2wy + 3wy
=5wy
27. =6wy + 7wy
=13wy
28. =12wy^2 - 3wy^2
=9wy^2
29. =3w^2 - 4w^3
30. =6 yw^2 - 4y^2

21. (w)(w)+(y)(y)
w(2)+y(2)

22. (y)(y)(y)(4)+(8)(y)(y)
=4y4y4y+8y8y8y
=64y(3)512y(3)
=y(3)(64+512)

23. (w)(w)(w)(12)-(4)(w)(w)(w)
=12w12w12w-4w4w4w
=1728w(3)-64w(3)
=w(3)(1728-64)

24. (w)(w)(y)(y)
=w(2)y(2)

25. (2)(w)(y)(w)+(5)(y)(w)(y)
=2w2y2w+5y5w5y
=2w(2)2y+5y(2)5w

26. (2)(w)(y)+(3)(y)(w)
=2w2y+3y3w
=5y(2)5w(2)

27. (6)(w)(y)+(7)(y)(w)
=6w6y+7y7w
=13y(2)13w(2)

28. (12)(w)(y)(y)-(3)(y)(y)(w)
=12w12y12y-3y3y3w
=9w(2)135y(2)

29. (w)(w)(3)-(4)(w)(w)(w)
=3w3w-4w4w4w
=9w(2)-64w(3)

30. (6)(w)(y)(w)-(4)(y)(y)
=6w6y6w-4y4y
=36w(2)6y-16y(2)

2007-10-22 16:24:38 補充：
要分因式分解展開法拼項法...............................................................................................................