1.√2 -2(√2 -1)-³√8 2.(2X-1)²=49 3.X³-3=3/8
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1.√2 -2(√2 -1)-³√8 2.(2X-1)²=49 3.X³-3=3/8
1.√2 -2(√2 -1)-³√8 2.(2X-1)²=49 3.X³-3=3/8
1.√2 -2(√2 -1)-³√8 2.(2X-1)²=49 3.X³-3=3/8
1.√2 -2(√2 -1)-³√8
=√2 -2√2+2-2
=-√2
2.(2X-1)²=49
2X-1=7 或2x-1=-7
x=4 或x=-3
3.X³-3=3/8
X³=27/8
x=3/2