(100-2x)(50-x)=3600

问题描述:

(100-2x)(50-x)=3600

(100-2x)(50-x)=3600
去括号得
5000-200x+2x^2=3600
则2x^2-200x-1400=0
x^2-100x-700=0
(x-50)^2=3200
x-50=±40√2
则x=50+40√2或x=50-40√2