分解因式,求解!
5个回答
展开全部
有两个公式 a5+b5=(a+b)(a^4-a^3b+a^2b^2-ab^3+b^4)
a5-b5=(a-b)(a^4+a^3b+a^2b^2+ab^3+b^4)
原式x^8+x^6+x^4+x^2+1=(x^2-1)(x^8+x^6+x^4+x^2+1)/(x^2-1)
=(x^10-1)/(x^2-1) =(x^5+1)(x^5-1)/(x^2-1)
=(x+1)(x^4-x^3+x^2-x+1)(x-1)(x^4+x^3+x^2+x+1)/(x^2-1)
=(x^4-x^3+x^2-x+1))(x^4+x^3+x^2+x+1)
http://zhidao.baidu.com/question/287580347.html
望及时采纳谢谢!
a5-b5=(a-b)(a^4+a^3b+a^2b^2+ab^3+b^4)
原式x^8+x^6+x^4+x^2+1=(x^2-1)(x^8+x^6+x^4+x^2+1)/(x^2-1)
=(x^10-1)/(x^2-1) =(x^5+1)(x^5-1)/(x^2-1)
=(x+1)(x^4-x^3+x^2-x+1)(x-1)(x^4+x^3+x^2+x+1)/(x^2-1)
=(x^4-x^3+x^2-x+1))(x^4+x^3+x^2+x+1)
http://zhidao.baidu.com/question/287580347.html
望及时采纳谢谢!
展开全部
原式=x^8+x^6+x^4+x^2+1
=(x^2-1)(x^8+x^6+x^4+x^2+1)/(x^2-1)
=(x^10-1)/(x^2-1)
=(x^5+1)(x^5-1)/(x^2-1)
=(x+1)(x^4-x^3+x^2-x+1)(x-1)(x^4+x^3+x^2+x+1)/(x^2-1)
=(x^4-x^3+x^2-x+1))(x^4+x^3+x^2+x+1)
=(x^2-1)(x^8+x^6+x^4+x^2+1)/(x^2-1)
=(x^10-1)/(x^2-1)
=(x^5+1)(x^5-1)/(x^2-1)
=(x+1)(x^4-x^3+x^2-x+1)(x-1)(x^4+x^3+x^2+x+1)/(x^2-1)
=(x^4-x^3+x^2-x+1))(x^4+x^3+x^2+x+1)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
x^8+x^6+x^4+x^2+1
令a=x^2, b=1
则:x^8+x^6+x^4+x^2+1
=a^4+a^3b+a^2b^2+ab^3+b^4
=(a^5-b^5)/(a-b)
=(x^10-1)/(x^2-1)
=(x^5+1)(x^5-1)/(x+1)(x-1)
=[(x^5+1)/(x+1)]*[(x^5-1)/(x-1)]
=(x^4-x^3+x^2-x+1)(x^4+x^3+x^2+x+1)
令a=x^2, b=1
则:x^8+x^6+x^4+x^2+1
=a^4+a^3b+a^2b^2+ab^3+b^4
=(a^5-b^5)/(a-b)
=(x^10-1)/(x^2-1)
=(x^5+1)(x^5-1)/(x+1)(x-1)
=[(x^5+1)/(x+1)]*[(x^5-1)/(x-1)]
=(x^4-x^3+x^2-x+1)(x^4+x^3+x^2+x+1)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
答案是,具体过程如下:
谢:题意:F(x)的= X ^ 4 +6×2 +25 a是P(X)= X 2 + BX + C,设函数f(x)的另一个因素是:(X2 + BX + C)(×2×2 + AX + D,同理集G(X)的另一个因素是3x 2 + ex第+ F
+斧+ D)= X4 +6 X2 +25(1)
(X2 + BX + C)(3 2 +前+ F)= 3X4 +4 X2 +28 X +5(2)
( 1)简化:
(×2 + BX + C)(×2 + AX + D)= X ^ 4 +6×2 +25
X ^ 4 +斧子^ 3 + DX 2 + BX ^ 3 + ABX 2 + BDX + CX 2 + ACX + CD = X ^ 4 +6×2 +25
X ^ 4 +(A + B)X ^ 3 +(D + AB + C)×2 +(BD + AC)X + CD = X ^ 4 +6×2 +25
A + B = 0(3)
D + AB + C = 6(4 )
BD + AC = 0(5)
CD = 25(6)
(3)=-B(5),我们有:
BD- BC = 0 =
(6)为D = C =±5
(5)D + C = 2 +6>
所以C =D = 5
= 2,B = -2(7)
或A = -2,B = 2(8)
(3X 2 +前+ F)( ×2 + BX + C)= 3 ^ 4 +4×2 +28 X +5
3 ^ 4 +3 BX CX 2 ^ 3 +3 +前+ BEX 2 ^ 3 + CEX + FX 2 + BFX + CF = 3X ^ 4 +4×2 +28 X +5
3 ^ 4 +(3B + E)??X ^ 3 +(3C + + F)×2 +(CE + BF)× + CF = 3X ^ 4 + 4X 2 +28 x +5
3B + E = 0
3C + + F = 4,
CE + BF = 28
CF = 5
多项式函数f(x)= X4 X2 +25 +6 C = 5,已经到了这样:
由CF = 5是F = 1,C = 5,F = 1 = 28,也进入CE + BF:5E + B = 28
3B + E = 0:E =-3B代入5E + B = 28,太:B = -2
组合推出一个多项式(7):
B = -2,C = 5
:多项式p(X)= X 2 + BX + C的表达是:
p(倍)= 2-2×5 /> p(1)= 1-2 5 = 4
谢:题意:F(x)的= X ^ 4 +6×2 +25 a是P(X)= X 2 + BX + C,设函数f(x)的另一个因素是:(X2 + BX + C)(×2×2 + AX + D,同理集G(X)的另一个因素是3x 2 + ex第+ F
+斧+ D)= X4 +6 X2 +25(1)
(X2 + BX + C)(3 2 +前+ F)= 3X4 +4 X2 +28 X +5(2)
( 1)简化:
(×2 + BX + C)(×2 + AX + D)= X ^ 4 +6×2 +25
X ^ 4 +斧子^ 3 + DX 2 + BX ^ 3 + ABX 2 + BDX + CX 2 + ACX + CD = X ^ 4 +6×2 +25
X ^ 4 +(A + B)X ^ 3 +(D + AB + C)×2 +(BD + AC)X + CD = X ^ 4 +6×2 +25
A + B = 0(3)
D + AB + C = 6(4 )
BD + AC = 0(5)
CD = 25(6)
(3)=-B(5),我们有:
BD- BC = 0 =
(6)为D = C =±5
(5)D + C = 2 +6>
所以C =D = 5
= 2,B = -2(7)
或A = -2,B = 2(8)
(3X 2 +前+ F)( ×2 + BX + C)= 3 ^ 4 +4×2 +28 X +5
3 ^ 4 +3 BX CX 2 ^ 3 +3 +前+ BEX 2 ^ 3 + CEX + FX 2 + BFX + CF = 3X ^ 4 +4×2 +28 X +5
3 ^ 4 +(3B + E)??X ^ 3 +(3C + + F)×2 +(CE + BF)× + CF = 3X ^ 4 + 4X 2 +28 x +5
3B + E = 0
3C + + F = 4,
CE + BF = 28
CF = 5
多项式函数f(x)= X4 X2 +25 +6 C = 5,已经到了这样:
由CF = 5是F = 1,C = 5,F = 1 = 28,也进入CE + BF:5E + B = 28
3B + E = 0:E =-3B代入5E + B = 28,太:B = -2
组合推出一个多项式(7):
B = -2,C = 5
:多项式p(X)= X 2 + BX + C的表达是:
p(倍)= 2-2×5 /> p(1)= 1-2 5 = 4
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询