(x-1分之x²+5x) - (x²-x分之2x²+4x)求解释
问题描述:
(x-1分之x²+5x) - (x²-x分之2x²+4x)求解释
答
(x-1分之x²+5x) - (x²-x分之2x²+4x)
=(x²+5x)/(x-1)-(2x+4)/(x-1)
=(x²+3x-4)/(x-1)
=(x+4)(x-1)/(x-1)
=x+4