(1) x(4次方)-y(4次方)
{即係::.x4次方減y4次方}
(2) 15x²+5xy-10y²
10點------factorization`急!
2007-07-25 1:05 am
回答 (4)
2007-07-25 1:11 am
✔ 最佳答案
1. x^4 - y^4= (x^2)^2 - (y^2)^2
= (x^2 + y^2) (x^2 - y^2)
= (x^2 + y^2) (x + y) (x - y)
2. 15x^2 + 5xy - 10y^2
= 5 (3x^2 + xy - 2y^2)
= 5 (3x - 2y) (x + y)
2007-07-25 1:15 am
(1)
(x²-y²)(x²+y²)
(x-y)(x+y)(x²+y²)
(2)
15x²+5xy-10y²
5(3x²+xy-2y²)
5(3x-2y)(x+y)
(x²-y²)(x²+y²)
(x-y)(x+y)(x²+y²)
(2)
15x²+5xy-10y²
5(3x²+xy-2y²)
5(3x-2y)(x+y)
2007-07-25 1:15 am
1) x^4-y^4 = (x²-y²)(x²+y²)
=(x-y)(x+y)(x²+y²)
2) 15x²+5xy-10y² =5(3x²+xy-2y²)
= 5(3x-2y)(x+y)
=(x-y)(x+y)(x²+y²)
2) 15x²+5xy-10y² =5(3x²+xy-2y²)
= 5(3x-2y)(x+y)
參考: ME
2007-07-25 1:13 am
1)
x^4 - y^4
= (x^2 - y^2)(x^2 + y^2)
= (x-y)(x+y)(x^2+y^2)
2)
15x^2 + 5xy - 10y^2
= 5(3x^2 + xy - 2y^2)
= 5(3x-2y)(x+y)
x^4 - y^4
= (x^2 - y^2)(x^2 + y^2)
= (x-y)(x+y)(x^2+y^2)
2)
15x^2 + 5xy - 10y^2
= 5(3x^2 + xy - 2y^2)
= 5(3x-2y)(x+y)
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