Tìm x .
(x+1).(x+2).(x+5)-x^2.(x+8)= 27
Những câu hỏi liên quan
tìm x (x+1).(x+2).(x+5)-x2.(x+8)=27
\(\left(x+1\right)\left(x+2\right)\left(x+5\right)-x^2\left(x+8\right)=27\)
\(\Leftrightarrow\left(x^2+3x+2\right)\left(x+5\right)-\left(x^3+8x^2\right)-27=0\)
\(\Leftrightarrow17x-17=0\\ \Leftrightarrow x=1\)
Đúng 1
Bình luận (1)
Bài 8. Tìm số nguyên x
1) x – 12 = (-8) + (-17) 2) (7 – x) – 5 = - 13 3) 7 – 3x = 28 4) 2(x + 1) + 18 = - 4 | 5) 37 – x = 12 6) x + 5 = -18 7) 27 – (x + 1) = 2. (52 – 24) 8) (x – 3)(x + 3) = 0
|
1) x-12=(-8)+(-17)
x-12=(-25)
x = (-25)+12
x = (-13)
Đúng 1
Bình luận (0)
Tìm X
A, (X+1)(X+2)(X+5) - X^2(X+8)=27
B, 1/4 X^2-(1/2X-4)1/2X=-14
C, 3(1-4X)(X-1)+4(3X-2)(X+3)=-27
D,(X+3)(X^2-3X+9) - X(X-1)(X+1)=27
21 tháng 7 2023 lúc 12:24
tìm x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
1: x=3/4-1/2=3/4-2/4=1/4
2: x-1/5=2/11
=>x=2/11+1/5=21/55
3: x-5/6=16/42-8/56
=>x-5/6=8/21-4/28=5/21
=>x=5/21+5/6=15/14
4: x/5=5/6-19/30
=>x/5=25/30-19/30=6/30=1/5
=>x=1
5: =>|x|=1/3+1/4=7/12
=>x=7/12 hoặc x=-7/12
6: x=-1/2+3/4
=>x=3/4-1/2=1/4
11: x-(-6/12)=9/48
=>x+1/2=3/16
=>x=3/16-1/2=-5/16
Đúng 3
Bình luận (0)
1)x= 1/4
2)x= 2/11+ 1/5
x= 21/55
3)x - 5/6 = 5/21
x = 5/21+5/6
x = 15/14
4)x/5 = 5/6 + -19/30
x:5 = 1/5
x = 1/5.5
x = 1
5) |x| - 1/4 = 6/18
|x| = 6/18 - 1/4
|x| =7/12
⇒x= 7/12 hoặc -7/12
6)x = -1/2 +3/4
x= 1/4
7) x/15 = 3/5 + -2/3
x:15 = -1/15
x = -1/15. 15
x = -1
8)11/8 + 13/6 = 85/x
85/24 = 85/x
⇒ x = 24
9) x - 7/8 = 13/12
x = 13/12 + 7/8
x = 47/24
10)x - -6/15 = 4/27
x = 4/27 + (-6/15)
x = -34/135
11) -(-6/12)+x = 9/48
x= 9/48 - 6/12
x = -5/16
12) x - 4/6 = 5/25 + -7/15
x -4/6 = -4/15
x = -4/15 + 4/6
x = 2/5
Đúng 1
Bình luận (0)
Tìm x,biết
(x+1)*(x+2)*(x-5)-x2*(x+8)=27
Tìm x biết
a) 3(1-4x).(x-1)+4(3x-2).(x+3)=-27
b) (x+3).(x2-3+9)-.(x-1).(x+1)=27
c) 2x2+3(x-1).(x+1)=5x.(x+1)
d) 8(x-1).(x+5)-(x+2).(x+5)=3(x-1).(x+2)
tìm x theo hằng đẳng thức :(x+1)(x+2)(x+5)-x2(x+8)=27
(x + 1)(x + 2)(x + 5) − x2(x + 8) = 27
x2 + 2x + x + 2(x + 5) − x3 − 8x2 = 27
x2(x + 5) + 2x(x + 5) + x(x + 5) + 2(x + 5) − x3 − 8x2 = 27
x3 + 5x2 + 2x2 + 10x + x2 + 5x + 2x + 10 − x3 − 8x2 = 27
17x + 10 = 27
17x = 17
x = 17 : 17
x = 1
Vậy x = 1
Đúng 1
Bình luận (0)
Bài 4. Tìm x biết:
a. \(\dfrac{x}{5}=\dfrac{2}{5},\dfrac{3}{8}=\dfrac{6}{x},\dfrac{1}{9}=\dfrac{x}{27}\)
b. \(\dfrac{4}{x}=\dfrac{8}{6},\dfrac{3}{x-5}=\dfrac{-4}{x+2},\dfrac{x}{-2}=\dfrac{-8}{x}\)
a,2/5 = 2/5 ; 3/8=6/16 ; 1/9=3/27
b, 4/3=8/6 ; -1=-1 ; -4/-2=-8/4
tick cho mik nhé
Đúng 0
Bình luận (0)
a) x= 2, x= 8.(6 : 3) = 16, x= 1. (27 : 9)= 3
b) x= 6 : (8 : 4) = 3, x= -1, x= -2 . -8 = x.x => 16 = x2 => 42 = x2 => x=4
Tick cho mình đi 
Đúng 0
Bình luận (0)
Tìm x
(3x-3)(.5-21x)+(7x +4)(6x-5)=45
(x+1)(x+2)(x+5)-x^2(x+8)=27