(2x-10)(x-10)·5=500怎么算?写仔细点,谢谢_数学解答

(2x-10)(x-10)·5=500怎么算?
写仔细点,谢谢

人气：203 ℃　时间：2020-07-07 03:26:55

解答

(2X-10)(x-10)*5=500(2X-10)(x-10)=100(X-5)(x-10)=50X2-15X+50=50X2-15X=0X(X-15)=0X=0 或X=15