`5x+4x^2=0`
`<=>x(5+4x)=0`
TH1: x=0
TH2: `5+4x=0`
`<=>4x=-5`
`<=>x=-5/4`
Vậy: ...
Tìm x
a) 4x(x + 1) = 8(x + 1)
b) x(x – 1) – 2(1 – x) = 0
c) 5x(x – 2) – (2 – x) = 0
d) 5x(x – 200) – x + 200 = 0
e) x3 + 4x = 0
f) (x + 1) = (x + 1)2
Tìm x: \(-x^4+4x^2-5x^2+20=0\)
Tìm x , biết :
a. x (2x - 7) - 4x + 14 = 0
b. 5x3 + x2 - 4x - 9 = 0
c. 3x3 - 7x2 + 6x - 14 = 0
d. 5x2 - 5x = 3 (x - 1)
e. 4x2 - 25 - (4x - 10) = 0
f. x3 + 27 + (x + 3) (x - 9) = 0
Tìm x , biết :
a. x (2x - 7) - 4x + 14 = 0
b. 5x3 + x2 - 4x - 9 = 0
c. 3x3 - 7x2 + 6x - 14 = 0
d. 5x2 - 5x = 3 (x - 1)
e. 4x2 - 25 - (4x - 10) = 0
f. x3 + 27 + (x + 3) (x - 9) = 0
tìm X
a) x^3-5x^2-9x=0
b)(4x-3)^2-3x(3-4x)=0
Tìm x,biết
1) 3x^2 - 4x = 0
2) (x^2 - 5x) + x - 5 = 0
3) x^2 - 5x + 6 = 0
4) 5x(x-3) - x+3 = 0
5) x^2 - 2x + 5 = 0
6) x^2 + x -6 = 0
Tìm x
a) 3x(4x - 3) - 2x(5 - 6x) = 0
b) 5(2x - 3) + 4x(x - 2) + 2x(3 - 2x) = 0
c) 3x(2 - x) + 2x(x - 1) = 5x(x + 3)
d) 3x (x + 1) - 5x(3 - x) + 6(x^2 + 2x + 3) = 0
Tìm x, biết
a) 5x-3{4x-2[4x-3(5x-2)]}=182
b)(x2+2x+4).(2-x)+x.(x-3).(x+4)-x2+24=0
Tìm x:
a, 3x (4x -3) - 2x (5-6x) = 0
b, 5 (2x-3) + 4x (x-2) + 2x (3-2x) = 0
c, 3x (2-x) + 2x (x-1) = 5x (x+3)
d, 3x (x+1) - 5x (3-x) + 6(x2 + 2x + 3) = 0
Tìm x biết
a) 25x^2 -1-(5x-1)(x+2) = 0
b) (2x-3)-(3-2x)(x-1) = 0
c) 9 -4x^2-(6+4x)(x-5) = 0
