(X²-X-5)/X+2=(X+2)+1/(X+2)-5是如何化简的来的,步骤??~~~~
參考答案:(X²-X-5)/(X+2)
=[(x^2+4x+4)-(5x+10)+1]/(x+2)
=[(x+2)^2-5(x+2)+1]/(x+2)
=(x+2)+1/(x+2)-5
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(X²-X-5)/X+2=(X+2)+1/(X+2)-5是如何化简的来的,步骤??~~~~
參考答案:(X²-X-5)/(X+2)
=[(x^2+4x+4)-(5x+10)+1]/(x+2)
=[(x+2)^2-5(x+2)+1]/(x+2)
=(x+2)+1/(x+2)-5