(30-x)(解50-x)=50*30*75%怎么解RT

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(30-x)(解50-x)=50*30*75%怎么解RT
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(30-x)(解50-x)=50*30*75%怎么解RT
(30-x)(解50-x)=50*30*75%怎么解
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(30-x)(解50-x)=50*30*75%怎么解RT
(30-x)(50-x)=50*30*75%
1500-80x+x^2=1125
x^2-80x+375=0
(x-5)(x-75)=0
x=5 or x=75

(30-x)(50-x)=50*30*75%
(x-30)(x-50)=1125
x²-80x+375=0
(x-5)(x-75)=0
x-5=0或者x-75=0
x=5或者x=75