\(\left(x+3\right)\left(x-4\right)+\left(x+5\right)\left(x-4\right)=0\)
\(\left(x-4\right)\left(x+3+x+5\right)=0\)
\(\left(x-4\right)\left(2x+8\right)=0\)
\(\left[{}\begin{matrix}x-4=0\Leftrightarrow x=4\\2x+8=0\Leftrightarrow x=-4\end{matrix}\right.\)
Tìm x a) |5/3.x|=|-1/6|
B) |3/4.x-3/4|-3/4=|-3/4|
C)|x+3/5|-|x-7/3|=0
tìm x biết
a) (5x-1)(2x-1/3)=0
b) (x^2+1)(x-4)=0
c) 2x^2 -1/3x=0
d) (4/5)^5.x=(4/5)^7
e)Tìm x thuộc z để A=x+5/x-2 có giá trị nguyên
4 Tìm x :
(x+2).(4-x)=0 ; d) (x+1)+(x+3)+(x+5)+...+(x+99)=0
Tìm X:
a) (X - 1) (X+3)<0
b) (X - 2) (X - 4) (X+5)>0
c) (X2 - 4) (X - 3)<0
d) (X2 - 9) (X+4)>0
Tìm X:
a) (X - 1) (X+3)<0
b) (X - 2) (X - 4) (X+5)>0
c) (X2 - 4) (X - 3)<0
d) (X2 - 9) (X+4)>0
Tìm x ,y ,z biet :
a, |x+3/4|+|y-1/5|+|x+y+z|=0
b, |3x-4|+|3y-5|=0
c,|x+3/4|+|y-2/5|+|z+1/2| <0
d, |x+1/5|+|3-y|=0
B2: Tìm x
a) | x | = 3,5
b) |1-x |+ 0,73 = 3
c) -5/8 + x = 4/9
d) x.(1/5 + 1/4) - (1/7 + 1/8) =0
e) | x | + -2,7
f) |x + 3/4 | -5 = -2
Bài1:Tìm x,biết:
a,(2-x).(3+x)>0
b,( x+4 ).( x-5)<0
c,( 5-2x ).( x+4 )>0
d,( 9+2x ).( 3-2x )<0
bài 15 :tìm x∈Q, biết.
a) ( x - 3).( x +4 ) > 0 b)( x + 2).( x - 5) < 0
