早教吧作业答案频道 -->数学-->
(5x^3-3y^3)^2-(3x^3-5y^3)^23a(b^2+9)^2-108ab^2676^3+676*324*352-324^3-3x^3-81y^34x^2y^2-(x^2+y^2)^2(4a^2-9b^2)+(4a+3b)...
题目详情
(5x^3-3y^3)^2-(3x^3-5y^3)^2
3a(b^2+9)^2-108ab^2
676^3+676* 324* 352-324^3
-3x^3-81y^3
4x^2y^2-(x^2+y^2)^2
(4a^2-9b^2)+(4a+3b)
...
3a(b^2+9)^2-108ab^2
676^3+676* 324* 352-324^3
-3x^3-81y^3
4x^2y^2-(x^2+y^2)^2
(4a^2-9b^2)+(4a+3b)
...
▼优质解答
答案和解析
1、
(5x^3-3y^3)^2-(3x^3-5y^3)^2
＝〔(5x^3-3y^3)+(3x^3-5y^3)〕〔(5x^3-3y^3)-(3x^3-5y^3)〕
= (8x^3-8y^3)(2x^3+2y^3)
=8(x^3-y^3)*2(x^3-y^3)
=16(x^6-y^6)
2、
3a（b^2 +9）^2-108ab^2
=3a[(b^2+9)^2-36b^2]
=3a(b^2+9+6b)(b^2+9-6b)
=3a(b+3)^2(b-3)^2
3、
676^3+676*324*352-324^3
=676^3+676*324*(676-324)-324^3
=676^3+676^2*324-676*324^2-324^3
=676^3-3*676^2*324+3*676*324^2-324^3+4*676^2*324-4*676*324^2
=(676-324)^3+4*676*324*(676-324)
=352^3+4*676*324*352
=352(352^2+4*676*324)
=352000000
4、
-3x^3-81y^3
=-3x^3-3*3^3y^3
=-3(x^3-(3y)^3)
=-3(x-3y)(x^2+xy+(3y)^2)
5、
4x^2y^2-(x^2+y^2)^2
=4x^2y^2-x^4-2x^2y^2y^2-y^4
=-x^4+2x^2y^2y^2-y^4
=-(x^2-y^2)^2
6、
(4a^2-9b^2)+(4a+3b)
这道题你没有抄错吧!
(5x^3-3y^3)^2-(3x^3-5y^3)^2
＝〔(5x^3-3y^3)+(3x^3-5y^3)〕〔(5x^3-3y^3)-(3x^3-5y^3)〕
= (8x^3-8y^3)(2x^3+2y^3)
=8(x^3-y^3)*2(x^3-y^3)
=16(x^6-y^6)
2、
3a（b^2 +9）^2-108ab^2
=3a[(b^2+9)^2-36b^2]
=3a(b^2+9+6b)(b^2+9-6b)
=3a(b+3)^2(b-3)^2
3、
676^3+676*324*352-324^3
=676^3+676*324*(676-324)-324^3
=676^3+676^2*324-676*324^2-324^3
=676^3-3*676^2*324+3*676*324^2-324^3+4*676^2*324-4*676*324^2
=(676-324)^3+4*676*324*(676-324)
=352^3+4*676*324*352
=352(352^2+4*676*324)
=352000000
4、
-3x^3-81y^3
=-3x^3-3*3^3y^3
=-3(x^3-(3y)^3)
=-3(x-3y)(x^2+xy+(3y)^2)
5、
4x^2y^2-(x^2+y^2)^2
=4x^2y^2-x^4-2x^2y^2y^2-y^4
=-x^4+2x^2y^2y^2-y^4
=-(x^2-y^2)^2
6、
(4a^2-9b^2)+(4a+3b)
这道题你没有抄错吧!
看了 (5x^3-3y^3)^2-...的网友还看了以下：
12+32/(-2)^3-(-4)^2*515/(-5)+15/(-3)15/[(-5)*(-3) 2020-04-07 …
1+1又1/3+1又2/3+2+2又1/3+2又2/3+3+3又1/3+3又2/3.28+28又1 2020-04-07 …
1/1,-1/2,-2/1,1/3,2/2,1/3,-1/4,-2/3,-3/2,-4/1,1/5 2020-04-09 …
求1+2+2^2+2^3+2^4+…+2^2014的值.设S=1+2+2^2+2^3+2^4+…+ 2020-07-09 …
x^4+324=[(x+3)^2+9]*[(x-3)^2+9]RT,请给出式子两边相等的理由,并给 2020-07-19 …
324填上一个数使每个数都是3的倍数,各有几种填法17()8（）1464（）5从3,2,0,7选取 2020-07-19 …
(1/2)求下列的X.2(1)16X=324；3(2)3(X+5)-81=0.填空：直角三角 2020-07-19 …
(5x^3-3y^3)^2-(3x^3-5y^3)^23a(b^2+9)^2-108ab^2676 2020-07-19 …
观察下列各式:1×2=1/3(1×2×3-0×1×2)2×3=1/3(2×3×4-1×2×3)3× 2020-07-31 …
XA=B需要用初等列变换做02-1,2-1-3,-324,12-3,2-3-1怎么都换不出 2020-08-02 …