36x4+36x4-36x3
(KO BẮT BUỘC PHẢI LM)
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![](https://rs.olm.vn/images/avt/0.png?1311)
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47 x 2 94 25 x 3 75 16 x 6 96 18 x 4 72 28 x 6 168 36 x 4 144 82 x 5 410 99 x 3 297
![](https://rs.olm.vn/images/avt/0.png?1311)
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36/11 x 22/17 x 51/72
= 36 x 22 x 51/11 x 17 x 72
= 36 x 2 x 11 x 17 x 3/11 x 17 x 36 x 2
= 3
22/16 x 64/55 x 27/13
= 22 x 64 x 27/16 x 55 x 13
=2 x 11 x 16 x 4 x 27/16 x 5 x 11 x 13
= 216/65
36 x 48/12 x 24 + 18 x 104/36 x 4
= 12 x 3 x 2 x 24/12 x 24 + 18 x 13 x 2 x 4/ 18 x 2 x 4
= 6 + 13
= 19
=
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 2:
a: \(x^2\left(x^2-16\right)=0\)
\(\Leftrightarrow x\left(x-4\right)\left(x+4\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=4\\x=-4\end{matrix}\right.\)
b: \(x^8+36x^4=0\)
\(\Leftrightarrow x^4=0\)
hay x=0
a(b+3)-b(3+b)
=(3+b)(a-b)
Thay số, có: (3+1997).(2003-1997)
= 2000.6 =12000
xy(x+y)-2x-2y
xy(x+y)- 2(x+y)
(x+y).(xy-2)
Thay số, co: 7. (8-2)
7.4=28
![](https://rs.olm.vn/images/avt/0.png?1311)
cau hoi do la : ban co biet cau hoi nao ma bat buoc phai tra loi la ko ko?
= 180
HT
36 x 4 + 36 x 4 - 36 x 3
= ( 36 x 4 ) + ( 36 x 4 ) - ( 36 x 3 )
= 36 x ( 6 + 4 - 3 )
= 36 x 7
= 252