化简x减2分之x的平方加4加2减x分之4x,求半小时内解决!
问题描述:
化简x减2分之x的平方加4加2减x分之4x,求半小时内解决!
答
(x²+4)/(x-2)+4x/(2-x)
=(x²+4)/(x-2)-4x//(x-2)
=(x²+4-4x)/(x-2)
=(x-2)²/(x-2)
=x-2