计算: ( 2 5 − 2 ) 0 + | 2 − 5 | + ( − 1 ) 2017 − 1 3 × 45 .
计算:(1) (2)
.(本题8分)计算:
(本题15分)计算:(1) (2) (3)
计算:
解方程:2x2-6x+1=0.