Question

上面的填空选择怎么写呀,发给我的一定给好评~

Answer 1

C

C

4和6

2x²-x-3=0 2x² -1 -3

m不等于±1 m=-1

2

x=1或-2/3

（1）x²-4x-4=0 (2)2x²-1=4x

(x-2)²=8 2x²-1-4x=0

x-2=±2√2 2(x-1)²=3

x=2±2√2 (x-1)²=3/2

x-1= ±√6/2

x=1±(√6/2)