Question

1500(1+0.5)(1-x)(1-x)=1500+500怎样算

Answer 1

1500×1.5(1-x)²=2000

(1-x)²=8/9

1-x=±√(8/9)=±2(√2)/3

x=1±2(√2)/3

即x1=(3+2√2)/3,x2=(3-2√2)/3

近似值是

x1=1.943,x2=0.0572