列各式中x的值4x²-9=0 3﹙1-x﹚²-3=0 要过程!⑴4x²-9=0 ⑵ 3﹙1-x﹚²-3=0
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列各式中x的值4x²-9=0 3﹙1-x﹚²-3=0 要过程!⑴4x²-9=0 ⑵ 3﹙1-x﹚²-3=0
列各式中x的值4x²-9=0 3﹙1-x﹚²-3=0 要过程!
⑴
4x²-9=0 ⑵ 3﹙1-x﹚²-3=0
列各式中x的值4x²-9=0 3﹙1-x﹚²-3=0 要过程!⑴4x²-9=0 ⑵ 3﹙1-x﹚²-3=0
4x²-9=0
4x²=9
x²=9/4
∴x=3/2 x=-3/2
3﹙1-x﹚²-3=0
3(x-1)²=3
(x-1)²=1
x-1=1 x-1=-1
∴x=2或x=0
4x²-9=0
x²=9/4
x=-3/2,x=3/2
3﹙1-x﹚²-3=0
(1-x)²=1
1-x=-1,1-x=1
x=2,x=0