我有一道题不会,需要详细的过程,请大家帮忙,谢谢
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(3-X)/(X-2)+[(X+2)-5/(X-2)]
=(3-X)/(X-2)+[(X+2)(X-2)/(X-2)-5/(X-2)]
=(3-X)/(X-2)+(X^2-4)/(X-2)-5/(X-2)
=[(3-X)+X^2-4-5]/(X-2)
=[3-X+X^2-9]/(X-2)
=(X^2-X-6)/(X-2)
=(X-3)(X+2)/(X-2)
不懂的欢迎追问,如有帮助请采纳,谢谢!
=(3-X)/(X-2)+[(X+2)(X-2)/(X-2)-5/(X-2)]
=(3-X)/(X-2)+(X^2-4)/(X-2)-5/(X-2)
=[(3-X)+X^2-4-5]/(X-2)
=[3-X+X^2-9]/(X-2)
=(X^2-X-6)/(X-2)
=(X-3)(X+2)/(X-2)
不懂的欢迎追问,如有帮助请采纳,谢谢!
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解:(3 - x)/ (x - 2)+ 【 (x + 2)- 5 /(x - 2)】
=(3 - x)/(x - 2)+ (x + 2)(x - 2)/(x - 2) - 5 / (x - 2)
=(3 - x - 5)/ (x - 2)+ (x ² - 4)/(x - 2)
= (- x - 2 + x ² - 4)/(x - 2)
= (x ² - x - 6)/(x - 2)
=(3 - x)/(x - 2)+ (x + 2)(x - 2)/(x - 2) - 5 / (x - 2)
=(3 - x - 5)/ (x - 2)+ (x ² - 4)/(x - 2)
= (- x - 2 + x ² - 4)/(x - 2)
= (x ² - x - 6)/(x - 2)
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