8x²-2=4x8x²-4x-2=0;4x²-2x-1=0;4(x²-x/2+1/16)=1+1/4;4(x-1/4)²=5/4;(x-1/4)²=5/16;x-1/4=±√5/4;x=1/4±√5/4;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...