Junior high school mathematics unary quadratic equation

(1) Let the reduction rate be X. For the first time, it will be reduced by 5,000 yuan to 5,000-5,000 yuan, and for the second time, it will be reduced by (5,000-5,000 x) yuan to 5,000-5,000 x yuan, that is, 4,050 yuan, so it is 5,000-5,000 yuan.

② Consider the house price and two-year property fee.

Scheme 1: the house price is 4050* 100*0.98=396900, and the two-year property fee is 2 *12 *1.5 *100 = 3600, totaling ***400500.

Scheme 2: house price: 4050* 100=405000, and two-year property management fee: 0, totaling ***405000 yuan.

Obviously, the first option is more advantageous.