1、【-4x²-3y³】【12x²-9y³】
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/16 13:59:07
1、【-4x²-3y³】【12x²-9y³】
2、5x-6【3x+2】×【-2+3x】+54【x-三分之一】×【x+三分之一】
2、5x-6【3x+2】×【-2+3x】+54【x-三分之一】×【x+三分之一】
(-4x²-3y³)(12x²-9y³)
= -3(4x²+3y³)(4x²-3y³)
= -3(16x⁴-9y^6)
= 27y^6 - 48x⁴
5x-6(3x+2)×(-2+3x)+54(x-1/3)×(x+1/3)
= 5x -6(9x² -4) +54(x²-1/9)
= 5x -54x² +24 +54x² -6
= 5x-18
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= -3(4x²+3y³)(4x²-3y³)
= -3(16x⁴-9y^6)
= 27y^6 - 48x⁴
5x-6(3x+2)×(-2+3x)+54(x-1/3)×(x+1/3)
= 5x -6(9x² -4) +54(x²-1/9)
= 5x -54x² +24 +54x² -6
= 5x-18
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梳理知识,帮助别人,愉悦自己.
“数理无限”团队欢迎你
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