设实数x,y满足x^2+4y^2+2x-47+2=0,则x^2y+2x的值等于_________
问题描述:
设实数x,y满足x^2+4y^2+2x-47+2=0,则x^2y+2x的值等于_________
答
设实数x,y满足x^2+4y^2+2x-4y+2=0,(x+1)²+(2y-1)²=0;x+1=0;x=-1;2y-1=0;y=1/2;则x^2y+2x的值等于(-1)²×(1/2)+2×(-1)=1/2-2=-3/2;很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以...