\(\Leftrightarrow x^2+7x+12⋮3x\)
=>3x^2+21x+36 chia hết cho 3x
=>36 chia hết cho 3x
=>\(3x\in\left\{1;-1;2;-2;3;-3;4;-4;6;-6;9;-9;12;-12;18;-18;36;-36\right\}\)
hay \(x\in\left\{\dfrac{1}{3};-\dfrac{1}{3};\dfrac{2}{3};-\dfrac{2}{3};1;-1;\dfrac{4}{3};-\dfrac{4}{3};2;-2;3;-3;4;-4;6;-6;12;-12\right\}\)
tim x
a, ( 3-2x ) . ( 1/3 - 1/2 ) ^2 + 4 . (7-5x ) = 9-2x
b, 7 - 3x 1 - 3x
_______ = ______
4 + x x - 5
tim x
-2x(6x-2)+3x(4x-7)=8
(7x-2)(2x+3)-(3x-5)(4x+6)=2x2-5
+(-2x+3)-6x(3x-4)=-22x2+7x
tim x(x thuoc z)
7x-3 chia het cho x-2
2x-7 chia het cho 3x+2
3x2-12x+6 chia het cho x-2
Tim x E Z
â) x + 2 là U ( 3x -7 )
b) x -5 la B ( x + 1 )
c) 2x- 1 la U ( 5x 4 )
tim x
-(4x-1)-(5x+1)-(1-3x)=4.(2x-1)+6
1)a)2x-13=25+6x
b)12-x=3x+6
c)40-(25-2x)=x
d)|x-3|=5
e)|x-3|+(x+2)+(x+1)=12
2)tính
a)(-1).(-2).(-3).(-4).(-5).[(-3)-(-5)]
b)1-2+3-4+5-6+...-98+99
3)tim x
a)(x-1).(y-2)=5
b)x.(y-3)=12
giải thưởng 5 BẠN ĐẦU TIÊN NHẬN TICK
tim x biet : x.(3x-13)=10
1. 6 X mũ 3 -8 =40
2. 4 X mũ 5 +15=47
3. 2 X mũ 3-4=12
4. 5 X mũ 3-5=0
5. (X -5) mũ 2016 = (X-5) mũ 2018
6. (3X -2) mũ 20= (3X-1) mũ 20
7. (3X -1) mũ 10 = (3X-1) mũ 20
8. (2X -1) mũ 50 = 2X-1
9. (X phần 3 -5) mũ 2000= ( X phần 3-5) mũ 2008
tim x
a. x-10/2010 + x-3/2003 + x-2/2002 =-3
b. x-1009/1001 + x-4/1003 + x+10/1005 =7
