把下列各式分解因式: (1)1-100x² (2)-0.16+a²b²(
(3)(a+b+c)²-(a-b-c)²(4)9a²-(b-c)²(5)100p²-4q的6次方(6)4(2x+y)...
(3)(a+b+c)²-(a-b-c)²(4)9a²-(b-c)²(5)100p²-4q的6次方(6)4(2x+y)²-9(x-2y)²过程要详细
第二题后面(不是题目打错了 展开
第二题后面(不是题目打错了 展开
5个回答
展开全部
(1)1-100x² =(1+10x)(1-10x)
(2)-0.16+a²b²=(ab)²-0.4²=(ab+0.4)(ab-0.4)
(3)(a+b+c)²-(a-b-c)²
=(a+b+c+a-b-c)(a+b+c-a+b+c)
=2a(2b+2c)
=4a(b+c)
(4)9a²-(b-c)²
=(3a+b-c)(3a-b+c)
5)100p²-4q的6次方
=(10p)²-(2q³)²
=(10p+2q³)(10p-2q³)
=4(5p+q³)(5p-q³)
(6)4(2x+y)²-9(x-2y)²
=[2(2x+y)]²-[3(x-2y)]²
=[2(2x+y)+3(x-2y]][2(2x+y)-3(x-2y]
=[4x+2y+3x-6y][4x+2y-3x+6y]
=(7x-4y)(x+8y)
(2)-0.16+a²b²=(ab)²-0.4²=(ab+0.4)(ab-0.4)
(3)(a+b+c)²-(a-b-c)²
=(a+b+c+a-b-c)(a+b+c-a+b+c)
=2a(2b+2c)
=4a(b+c)
(4)9a²-(b-c)²
=(3a+b-c)(3a-b+c)
5)100p²-4q的6次方
=(10p)²-(2q³)²
=(10p+2q³)(10p-2q³)
=4(5p+q³)(5p-q³)
(6)4(2x+y)²-9(x-2y)²
=[2(2x+y)]²-[3(x-2y)]²
=[2(2x+y)+3(x-2y]][2(2x+y)-3(x-2y]
=[4x+2y+3x-6y][4x+2y-3x+6y]
=(7x-4y)(x+8y)
展开全部
(1)
1-100x²=(1+10x)(1-10x)
(2)
-0.16+a²b²=(ab+0.4)(ab-0.4)
(3)
(a+b+c)²-(a-b-c)²
=[(a+b+c)+(a-b-c)][(a+b+c)-(a-b-c)]
=4(b+c)
(4)
9a²-(b-c)²
=(3a)²-(b-c)²
=[3a+(b-c)][3a-(b-c)]
=(3a+b-c)(3a-b+c)
(5)
100p²-4q^6
=(10p+2q³)(10p-2q³)
(6)
4(2x+y)²-9(x-2y)²
=[2(2x+y)+3(x-2y)][2(2x+y)-3(x-2y)]
=(7x-4y)(x+8y)
如果不懂,请追问,祝学习愉快!
1-100x²=(1+10x)(1-10x)
(2)
-0.16+a²b²=(ab+0.4)(ab-0.4)
(3)
(a+b+c)²-(a-b-c)²
=[(a+b+c)+(a-b-c)][(a+b+c)-(a-b-c)]
=4(b+c)
(4)
9a²-(b-c)²
=(3a)²-(b-c)²
=[3a+(b-c)][3a-(b-c)]
=(3a+b-c)(3a-b+c)
(5)
100p²-4q^6
=(10p+2q³)(10p-2q³)
(6)
4(2x+y)²-9(x-2y)²
=[2(2x+y)+3(x-2y)][2(2x+y)-3(x-2y)]
=(7x-4y)(x+8y)
如果不懂,请追问,祝学习愉快!
追问
第三题好像错了吧
追答
最好漏了个a
(3)
(a+b+c)²-(a-b-c)²
=[(a+b+c)+(a-b-c)][(a+b+c)-(a-b-c)]
=4a(b+c)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
(1)1-100x²=(1+10x)(1-10x)
(2)-0.16+a²b²=(ab)²-0.4²=(ab+0.4)(ab-0.4)
(3)(a+b+c)²-(a-b-c)²=(a+b+c+a-b-c)(a+b+c-a+b+c)=2a*(2b+2c)=4a(b+c)
(4)9a²-(b-c)²=(3a+b-c)(3a-b+c)
(5)100p²-4q的6次方=(10p)²-(2q的三次)²=(10p+2q的三次)(10p-2q的三次)
(6)4(2x+y)²-9(x-2y)²=(4x+2y)²-(3x-6y)²=(4x+2y+3x-6y)(4x+2y-3x+6y)
=(7x-4y)(x+8y)
(2)-0.16+a²b²=(ab)²-0.4²=(ab+0.4)(ab-0.4)
(3)(a+b+c)²-(a-b-c)²=(a+b+c+a-b-c)(a+b+c-a+b+c)=2a*(2b+2c)=4a(b+c)
(4)9a²-(b-c)²=(3a+b-c)(3a-b+c)
(5)100p²-4q的6次方=(10p)²-(2q的三次)²=(10p+2q的三次)(10p-2q的三次)
(6)4(2x+y)²-9(x-2y)²=(4x+2y)²-(3x-6y)²=(4x+2y+3x-6y)(4x+2y-3x+6y)
=(7x-4y)(x+8y)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
都是a²-b²=﹙a+b﹚﹙a-b﹚的具体应用。
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
你和我们课课练上50业的题目一模一样
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