化簡(jiǎn)下例題:[(X平方—4)/(X平方—4X+4)-(X-2)/(X+2)]/X/(X-2)
熱心網(wǎng)友
(x^2-4)/(x^2-4x+4)-(x-2)/(x+2)]÷[x/(x-2)]={[(x+2)(x-2)]/[(x-2)(x-2)]-(x-2)/(x+2)}*(x-2)/x=[(x+2)(x+2)-(x-2)(x-2)]/[(x+2)(x-2)]*(x-2)/x=4x(x-2)/[x(x+2)(x-2)]=4/(x+2).
熱心網(wǎng)友
=1.
化簡(jiǎn)下例題:[(X平方—4)/(X平方—4X+4)-(X-2)/(X+2)]/X/(X-2)
(x^2-4)/(x^2-4x+4)-(x-2)/(x+2)]÷[x/(x-2)]={[(x+2)(x-2)]/[(x-2)(x-2)]-(x-2)/(x+2)}*(x-2)/x=[(x+2)(x+2)-(x-2)(x-2)]/[(x+2)(x-2)]*(x-2)/x=4x(x-2)/[x(x+2)(x-2)]=4/(x+2).
=1.