已知a^3十b^3=27,a^2b一ab^2=一6'求代数式(b^3一a^3)十(a^2b一3ab^2)一2(b^3一a
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/03 12:16:25
已知a^3十b^3=27,a^2b一ab^2=一6'求代数式(b^3一a^3)十(a^2b一3ab^2)一2(b^3一a^2b)的值
![已知a^3十b^3=27,a^2b一ab^2=一6'求代数式(b^3一a^3)十(a^2b一3ab^2)一2(b^3一a](/uploads/image/z/7802165-29-5.jpg?t=%E5%B7%B2%E7%9F%A5a%5E3%E5%8D%81b%5E3%3D27%2Ca%5E2b%E4%B8%80ab%5E2%3D%E4%B8%806%27%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F%28b%5E3%E4%B8%80a%5E3%29%E5%8D%81%28a%5E2b%E4%B8%803ab%5E2%29%E4%B8%802%28b%5E3%E4%B8%80a)
(b^3-a^3)+(a^2b-3ab^2)-2(b^3-ab^2)
=b^3-a^3+a^2b-3ab^2-2b^3+2ab^2
=-a^3-b^3+a^2b-ab^2
=-(a^3+b^3)+(a^2b-ab^2)
=-27+(-6)
=-33
=b^3-a^3+a^2b-3ab^2-2b^3+2ab^2
=-a^3-b^3+a^2b-ab^2
=-(a^3+b^3)+(a^2b-ab^2)
=-27+(-6)
=-33
已知a^3十b^3=27,a^2b一ab^2=一6'求代数式(b^3一a^3)十(a^2b一3ab^2)一2(b^3一a
已知ab=一5,a十b二一2,求代数式(3ab+10b)一[一5a一(3a一2b一2ab)]
先化简再求值 (a一2b)(a^2十2ab十4b^z)一a(a一5b)(a十3b),其中 a=-
已知(a一3)^2十|a十b|=0,求a分之b十b^a的值
已知:根号a一根号b=根号3十根号2,根号ab=根号6一根号3,求a十b的值
已知{a十b十c=25,2a一3b十2c=15,求b.
[(a一b)/(a+b)]^3÷[(a一b)^2/(a十b)]×[一(a十b)/(a一b)]^2
a十b=3,ab=2,(a一b)²
当a-2b=3,求代数式4*(2b一a)平方一3a十6b一5的值
a一2b=3,那么代数式9一a十2的值是多少
已知a的平方十2ab十b的平方=0,求代数式a(a十4b)一(a十2b)(a一2b)的值(具体过程)
已知多项式x十ax一y十b和bx一3x十6y一3的差的值与字母x的取值无关,求代数式3(a一2ab一b)一(4a十ab+