Rút gọn phân thức. Help me plsss
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AD
23 tháng 7 2023
\(a,=\sqrt{\left(\sqrt{3}\right)^2+2.\sqrt{3}.\sqrt{2}+\left(\sqrt{2}\right)^2}-\sqrt{\left(\sqrt{3}\right)^2-2.\sqrt{3}.\sqrt{2}+\left(\sqrt{2}\right)^2}\\ =\sqrt{\left(\sqrt{3}+\sqrt{2}\right)^2}-\sqrt{\left(\sqrt{3}-\sqrt{2}\right)^2}\\ =\left|\sqrt{3}+\sqrt{2}\right|-\left|\sqrt{3}-\sqrt{2}\right|\\ =\sqrt{3}+\sqrt{2}-\left(\sqrt{3}-\sqrt{2}\right)\\ =\sqrt{3}+\sqrt{2}-\sqrt{3}+\sqrt{2}\\=2\sqrt{2} \)
\(b,=\sqrt{\left(\sqrt{3}\right)^2+2.\sqrt{3}.1+1}+\sqrt{\left(\sqrt{3}\right)^2-2.\sqrt{3}.1+1}\\ =\sqrt{\left(\sqrt{3}+1\right)^2}+\sqrt{\left(\sqrt{3}-1\right)^2}\\ =\left|\sqrt{3}+1\right|+\left|\sqrt{3}-1\right|\\ =\sqrt{3}+1+\sqrt{3}-1\\ =2\sqrt{3}\)
\(c,=x-4+\sqrt{\left(4^2-2.4.x+x^2\right)}\\ =x-4+\sqrt{\left(4-x\right)^2}\\ =x-4+\left|4-x\right|\\ =x-4+x-4=2x-8\) (vì \(x>4\) )
@seven
DH
0
DT
Đỗ Thanh Hải
CTVVIP
17 tháng 9 2021
2 have been reading - haven't finished
3 have gone
4 am going to have
5 have washed
6 have broken
7 add - mix
8 have used
9 have lived
10 is always doing
11 am going
12 has taught
13 have already bought
14 always meet
DT
Đỗ Thanh Hải
CTVVIP
3 tháng 12 2021
1 She advised him to go on holiday when the weather got warmer
2 She warned them to keep out of that room at all time
3 He reminded me to post those letter
4 He asked them not to go into his study
5 I told him not to wait for me
7 She advised him not to go on holiday yet
8 She warned them against entering that room
14 tháng 10 2021
^A =130
^B =130
mà 2 góc này ở vị trí sole trong
⇒a//y(1)
^O=180⇒^O1=180-130
⇒^O1=50
Mà Ox là tia phân giác ⇒ ^O1=^O2=50
⇒^O2=B=50
Mà 2 góc này ở vị tri sole trong
⇒y//b(2)
Từ (1)(2)⇒a//b
me cann't help you because i'm stupid