(20+x)(400-10x)=3600
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(20+x)(400-10x)=36008000-200x+400x-10x²-3600=0
咨询记录 · 回答于2022-12-24
(20+x)(400-10x)=3600
(20+x)(400-10x)=3600?我正在为您解答:
您好!根据目前的题目信息来看,(20+x)(400-10x)=3600?这是一个简单的计算题
(20+x)(400-10x)=36008000-200x+400x-10x²-3600=0
(20+x)(400-10x)=36008000-200x+400x-10x²-3600=0-10x²+200x+4400=0
(20+x)(400-10x)=36008000-200x+400x-10x²-3600=0-10x²+200x+4400=0x²-20x-440=0
(20+x)(400-10x)=36008000-200x+400x-10x²-3600=0-10x²+200x+4400=0x²-20x-440=0解出来x=33.24或x=-13.24
答案:x=33.24或x=-13.24(20+x)(400-10x)=36008000-200x+400x-10x²-3600=0-10x²+200x+4400=0x²-20x-440=0解出来x=33.24或x=-13.24