Question

101²202+1用因式分解

Answer 1

①原式=101^2+2*101+1=(101+1)^2=102^2=10404

②原式=[(a+b)-3]^2=(a+b-3)^2

③原式=(a+b)^2-14(a+b)+49=[(a+b)-7]^2=(a+b-7)^2