=>(x+2)(x+5)=0
=>x=-2 hoặc x=-5
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Các câu hỏi tương tự
Tính:
a) 2^5 x 13^12 x 7^8 : 27 x 13^10 x 7^9
b) 2^n x 11 x 3 : 6^n x 3
c) 5^5 x 7 x 9^5 : 15^10
d) 7 x 8^10 x 27^9 - 8 x 9^13 x 2^27 : 7 x 6^26 x 2^2 - 2^4 x 8^3 x 27^9
e) 2^2^1^2015
f) 2015^0^2015^0^2015
Tính:
a) 2^5 x 13^12 x 7^8 : 2^7 x 13^10 x 7^9
b) 2^n x 11 x 3 : 6^n x 3
c) 5^5 x 7 x 9^5 : 15^10
d) 7 x 8^10 x 27^9 - 8 x 9^13 x 2^27 : 7 x 6^26 x 2^2 - 2^4 x 8^3 x 27^9
e) 2^2^1^2015
f) 2015^0^2015^0^2015
1) (3x-6)(x+5)+4(x-2)=0
2) 3(x-5)(2x+9)+3x-15=0
3) (x2-16)(12-4x)=0
4) (9-x2)(4x-8)=0
5) (8-x3)(5x-125)=0
6) 4x=8
Tìm x thuộc Z, biết:
a) (x^2 - 5) (x^2-25) <0
b) ( x+5) (9+x^2 )
c) ( x+3) ( x^2 +1) =0
d) (x+ 5) (x^2 - 4) =0
1, 72-3./x+1/=9
2, 17-(43-/x/)=45
3, 3/x-1/-5=7
4, -12.(x-5)+7.(3-x)=5
5, (x-2) . (x+4)=0
6, (x-2).(x+15)=0
7, (7-x).(x+19)=0
8, -5<x<1
9, /x/<3
10, (x.3).(x-5)<0
a, x+2=-9-11
b, x-2=-6+17
c,2x+5=-9+18
d, x+9=2-17
e, /x-5/=5
g,/x-5/=/-5/
h, (x-7)(x+8)=0 i, /x-2/=/-72/
Cho biểu thức sau : A = 9x +17/ x 1 Để A nguyên thì x cần đạt giá trị : Chọn câu trả lời đúng:
A. x ∈ { - 9 ; - 5 ; - 3 ; - 2 ; 0 ; 1 ; 4 ; 7 } B. x ∈ { - 9 ; - 5 ; - 3 ; - 2 ; 0 ; 1 ; 3 ; 8 }
C. x ∈ { - 8 ; - 5 ; - 3 ; - 2 ; 0 ; 1 ; 3 ; 7 } D. x ∈ { - 9 ; - 5 ; - 3 ; - 2 ; 0 ; 1 ; 3 ; 7 }
Tìm x € Z, biết
a) x ( x + 83 ) = 0 b) ( x + 97 ) ( x - 3 ) x = 0
c) ( x + 72 ) ( x - 8 ) ( x + 49 ) = 0
d) ( x2 + 7 ) ( x - 37 ) = 0
e) ( x + 5 ) ( x - 9 ) ( x2 + 9 ) = 0
g) ( x2 - 25 ) ( x - 3 ) ( x - 5 ) = 0
h) ( x2 - 49 ) ( x - 4 ) ( x + 38 ) = 0
Tìm x
a, ( 3 . x -1 ) . ( -1/2 .x + 5 ) = 0
b, 3. ( x - 1/2 ) - 5 ( x + 3 /5 ) = x + 1 /5
c, -5 . ( x + 1/5 ) - 1/2 . ( x - 2/3 ) = 3/2 . x - 5/6
d,3. ( 3 . x - 1/2 ) mũ 3 + 1/9 = 0
Tìm x
a.(x+4).(-3x+9)=0
b.(x^2 +1).(x-5)=0
c.(/x/ +2).(x^2-1)=0
d.(x^2 -3).(2 x^2 +10)=0
e.(x-2)^2 -25=0
(x-2).(x+2)<0