\(\Leftrightarrow\left(a-x\right)\left(a^2+ax+x^2\right)+\left(a-x\right)=0\)
=>(a-x)=0
=>a=x
\(\Leftrightarrow\left(a-x\right)\left(a^2+ax+x^2\right)+\left(a-x\right)=0\)
=>(a-x)=0
=>a=x
Bài 1: Tìm x biết a) x^3 - 4x^2 - x + 4= 0 b) x^3 - 3x^2 + 3x + 1=0 c) x^3 + 3x^2 - 4x - 12=0 d) (x-2)^2 - 4x +8 =0
Tìm x, biết :
a) \(x^3-\dfrac{1}{4}x=0\)
b) \(\left(2x-1\right)^2-\left(x+3\right)^2=0\)
c) \(x^2\left(x-3\right)+12-4x=0\)
tìm x biết: (x-3)^2-(x+3)^2=0
Tìm \(x\), biết :
a) \(x^2-2x-3=0\)
b) \(2x^2+5x-3=0\)
Tìm x biết
a) (x-1).(x+2).(x+3).(x+6)-28=0
b) (x^2+4x+3).(x^2+6x+8)=0
tìm x biết
a/ x^3-x^2-x+1=0
b/(2x^3-3)^2-(4x^2-9)=0
c/x^4+2x^3-6x-9=0
d/2(x+5)-x^2-5x=0
tìm x, biết:
a) (3x-1)2+(x+3)3-5(2x-3)(x+3)=0
b) x2-4x+4-(x+3)(x-3)=0
c) x2-3x+2=0
tìm x biết
a/ x^3-x^2-x+1=0
b/(2x^3-3)^2-(4x^2-9)=0
c/x^4+2x^3-6x-9=0
d/2(x+5)-x^2-5x=0
3. Tìm x, biết:
a) x3 - 1/9 = 0
b) 2x - 2y - x2 + 2xy - y2 = 0
c) x(x -30 = x - 3 = 0
d) x2 ( x - 3) + 27 - 9x = 0