一道初2数学题(x+k)(x+k+1)+1/4

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一道初2数学题(x+k)(x+k+1)+1/4一道初2数学题(x+k)(x+k+1)+1/4一道初2数学题(x+k)(x+k+1)+1/4原式=(X+K)*（X+K）+(X+K)+1/4=(X+K)*

一道初2数学题(x+k)(x+k+1)+1/4
一道初2数学题(x+k)(x+k+1)+1/4

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)

(x+k)(x+k+1)+1/4=(x+k+1/2)的平方