49.9²+9.98+0.1²; 因式分解
问题描述:
49.9²+9.98+0.1²; 因式分解
答
49.9²+9.98+0.1²
=49.9²+2*49.9*0.1+0.1²
=(49.9+0.1)^2
=50^2
=2500