ai biết 45 : (x – 4) = 9 bằng bao nhiêu ko
ai biết 45 : (x – 4) = 9 bằng bao nhiêu ko
Tìm x,biết:
a)6x2-(2x+5).(3x-2)=-12
b)(x+3).(x2-3x+9)-x.(x2+2)=12-5x
c)x2-25=6x-9
. Tìm x, biết:
a) 6x.(x – 5) + 3x.(7 – 2x) = 18 b) 2x.(3x + 1) + (4 – 2x).3x = 7 c) 0,5x.(0,4 – 4x) + (2x + 5).x = -6,5 | d) (x + 3)(x + 2) – (x - 2)(x + 5) = 6 e) 3(2x - 1)(3x - 1) – (2x - 3)(9x - 1) = 0 |
a, [(x/x^2-25) - (x-5/X^2+5x)] : (2x-5/x^2+5x) + ( x/ 5-x)
b, [(9/x^3-9x) + (1/x+3)] : [(x-3/x^2+ 3x) - ( x/3x+9)]
c, (1/x-1) - (x^3-x/x^2+1) . [(x/x^2+1-2x) + (1/1-x^2)]
Bài 3: Tìm x, biết:
a)(3x-5)(5-3x)+9(x+1)2=30
b)(x+4)2-(x+1)(x-1)=16
Bài 5. Tìm x, biết:
a) x (2x - 7) + 4x -14 = 0
b) x3 - 9x = 0
c) 4x2 -1 - 2(2x -1)2 = 0
d) (x3 - x2 ) - 4x2 + 8x - 4 = 0
bài 3: Tìm x, biết:
a)(2x-1)2-25=0 b)8x3-50x=0
c)2(x+3)-x2-3x=0 d)x3+27+(x+3)(x-9)=0
mình cần gấppppppppp
bài 3: Tìm x, biết:
a)(2x-1)2-25=0 b)8x3-50x=0
c)2(x+3)-x2-3x=0 d)x3+27+(x+3)(x-9)=0
mình cần gấpppppppppp
Tìm x , biết :
a. 4x3 - 9x = 0
b. 3x(x - 2) - 5x + 10 = 0
c. 4x (x + 3) - x2 + 9 = 0
d. (2x + 5) (x - 4) = (x - 4) (5 - x)
e. 16x2 - 25 = (4x - 5) ( 2x + 1)
f. (x + 1/5)2 = 64/9
g. 9(x + 2)2 = (x + 3)2