(4x^2--8xy+3y-9)^2+5x+3的绝对值=0,求5(4x^2-8xy+3y-1)与x^2+8xy-3y+2的值
问题描述:
(4x^2--8xy+3y-9)^2+5x+3的绝对值=0,求5(4x^2-8xy+3y-1)与x^2+8xy-3y+2的值
答
(4x^2--8xy+3y-9)^2+5x+3的绝对值=05x+3的绝对值=0x=-3/5(4x^2-8xy+3y-9)^2=04x^2-8xy+3y-9=04x^2-8xy+3y=94x^2-8xy+3y-1=9-1=8x^2+8xy-3y+2=5x^2-(4x^2-8xy+3y)+2=5*(-3/5)^2-8+2=5*9/25-6=9/5-6=21/5