一道初2数学题(x+k)(x+k+1)+1/4

问题描述:

一道初2数学题(x+k)(x+k+1)+1/4

原式=(X+K)*(X+K)+(X+K)+1/4
=(X+K)*(X+K)+2*1/2(X+K)+1/2*1/2
=(X+K+1/2)*(X+K+1/2)