1樓:雲台尋芳
(1)a2-4a+4
=(a-2)²
(2)a2-12ab+36b2
=(a-6b)²
(3)25x2+10xy+y2
=(5x+y)²
(4)16a4-8a2+1
=(4a²-1)²
=(2a+1)²(2a-1)²
2樓:匿名使用者
(1)a2-4a+4
=(a-2)²;
(2)a2-12ab+36b2
=(a-6b)²;
(3)25x2+10xy+y2
=(5x+y)²;
(4)16a4-8a2+1
=(4a²-1)²
=(2a-1)²(2a+1)²;
您好,答題不易
如有幫助請採納,謝謝!
3樓:匿名使用者
(1)a²-4a+4=(a-2)² (2)a²-12ab+36b²=(a-6b)² (3)25x2+10xy+y2
=(5x+y)² (4)16a4-8a2+1=(4a²-1)²=(2a+1)²(2a-1) (4)16a4-8a2+1
=(4a²-1)²=(2a+1)²(2a-1) ²
把下列各式因式分解:(1)x2+x+14;(2)8a-4a2-4;(3)(a2+9)2-36a2:(4)a2-2ab+b2-c2:(5)16x4
4樓:☆異鳴
(1)原式zhi=(x+12)2
;dao
(版2)原式=-4(a2-2a+1)
=-4(a-1)2;
(3)原式=(a2+9+6a)(a2+9-6a)=(a+3)2(a-3)2;
(4)原式=(a-b)2-c2
=(a-b+c)(a-b+c);
權(5)原式=(4x-9)2;
(6)原式=[(3(a-b)+2(a+b)]2=(5a-b)2.
把下列各式分解因式.(1)9a2-14b2(3)12a2?ab+12b2(3)a2-2ab-4+b2(4)x(x2+1)2-4x3(5)x2-7x-8
5樓:匿名使用者
(1)9a2-1
4b2=(3a+1
2b)(3a-1
2b);
(3)12a
?ab+12b
=12(a2-2ab+b2)=1
2(a-b)2;
(3)a2-2ab-4+b2=(a-b)2-4=(a-b+2)(a-b-2);
(4)x(x2+1)2-4x3=x[(x2+1)2-4x2]=x(x2+1+2x)(x2+1-2x)=x(x+1)2(x-1)2;
(5)x2-7x-8=(x-8)(x+1);
(6)x(x-y)2+y(y-x)=(x-y)[x(x-y)-y]=(x-y)(x2-xy-y).
把下列各式分解因式:(1)a5-a;(2)-3x3-12x2+36x;(3)9-x2+12xy-36y2;(4)a2+2ab+b2-a-b;(5)
6樓:灰哥哥湞營
(1)a5-a
=a(a4-1)
=a(a2+1)(a2-1)
=a(a2+1)(a+1)(a-1);
(2)-3x3-12x2+36x
=-3x(x2+4x-12)
=-3x(x+6)(x-2);
(3)9-x2+12xy-36y2
=9-(x2-12xy+36y2)
=9-(x-6y)2
=(3+x-6y)(3-x+6y);
(4)a2+2ab+b2-a-b
=(a+b)2-(a+b)
=(a+b)(a+b-1);
(5)(m2+3m)2-8(m2+3m)-20=(m2+3m-10)(m2+3m+2)
=(m+5)(m-2)(m+2)(m+1);
(6)4a2bc-3a2c2+8abc-6ac2=ac(4ab-3ac+8b-6c)
=ac[a(4b-3c)+2(4b-3c)]=ac(4b-3c)(a+2);
(7)(y2+3y)-(2y+6)2
=(y2+3y+2y+6)(y2+3y-2y-6)=(y2+5y+6)(y2+y-6)
=(y+2)(y+30(y-2)(y+3).
因式分解(1) 7x2-21x(2)-24x3+12x2-28x(3)a2b2-8ab+16(4)-25a2+16b2(5) 6(m-n)3-12(n-m)2
7樓:右肩蝶_貉刎
(1)7x2-21x=7x(daox-3);
(2)內-24x3+12x2-28x=-4x(6x2-3x+7);
(3)a2b2-8ab+16=(ab-4)2;
(4)-25a2+16b2=(4b+5a)(容4b-5a);
(5)6(m-n)3-12(n-m)2=6(m-n)2(m-n-2);
(6)49(2a-3b)2-9(a+b)2,=72(2a-3b)2-32(a+b)2,=[7(2a-3b)+3(a+b)][7(2a-3b)-3(a+b)],
=(17a-18b)(11a-24b).
因式分解:(1)12a2bc-24ab2c+18abc2;(2)x2-6x+5;(3)(y+2)(y+4)+1;(4)-a4b4+8a2b2-16
8樓:戈冰嵐
(1)12a2bc-24ab2c+18abc2=6abc(2a-4b+3c)
(2)x2-6x+5=(x-1)(x-5)(3)(y+2)(y+4)+1,
=y2+6y+9,
=(y+3)2;
(4)-a4b4+8a2b2-16,
=-(a4b4-8a2b2+16),
=-(a2b2-4)2,
=-(ab+2)2(ab-2)2.
因式分解 x n,因式分解 x n 1
崇元化 x n 1由等比數列前n項和公式,以1為首項,x為公比的數列前n項和為 1 x x 2 x n 2 x n 1 1 x n 1 x x n 1 x 1 整理一下為x n 1 x 1 1 x x 2 x n 2 x n 1 因式分解與解高次方程有密切的關係。對於一元一次方程和一元二次方程,初中...
因式分解(a b)2 4ab(a b) 4ab
a b 4ab 版a b 4a b a b 4ab a b 2ab a b 2ab a b a b 的4次方權 a b 4ab a b 4a b a b 2ab a b 4 第一步可以用換元法解釋 設a b x,ab y,則原式變為 x 4xy 4y x 2y a b 2ab 下一步為完全平方公回式...
因式分解 x 4 2x 3 2x 2 2x
x 4 2x 3 x 2 x 2 2x 1 x 2 x 2 2x 1 x 2 2x 1 x 2 1 x 2 2x 1 此題來根據因式 定理來解 源對於乙個多項式f x 若f a 0,則此bai多項式定有乙個因du式 x a 相反zhi若此多項式定有乙個因式 x a 則daof a 0 此題中,奇次項...