x^2(x+1)+2x(x+1)=0
(x+1)(x^2+2x)=0
(x+1)x(x+2)=0
=>x+1=0 hoặc x=0 hoặc x+2=0
. x+1=0 .x+2=0
=>x=-1 =>x=-2
Vậy x \(\in\) \(\left\{-1;0;-2\right\}\)
Tìm x , biết :
a. \(\left(x-2\right)^3-\left(x-3\right)\left(x^2+3x+9\right)+6\left(x+1\right)^2=15\)
b. \(2x^3-50x=0\)
c.\(5x^2-4\left(x^2-2x+1\right)-5=0\)
d. \(x^3-x=0\)
e. \(27x^3-27x^2+9x-1=1\)
tìm x biết
a) (2x+1)×(1-2x)+(2x - 1) ^2=22
b) (x-5)^2+(x-3)×(x+3)-2×(x+1)^2=0
c) (2x+3)^2+(2x -3)^2-2×(4x^2-9)=0
Tìm x a, (x+4)^2-(x+1)(x-1)=19 b, (2x-1)^2+(x+3)^2-5(x+7)(x-7)=0
Bài 1: Tìm x, biết:
a) (x+3)^3 - x(3x+1)^2+(2x+1) (4x^2-2x+1)=28
b) x^2-1)^3-(x^4+x^2+1) (x^2-1)=0
tìm x biết
a) x2(x+1)+2x(x+1)=0
1. Tìm x :
a) ( 2x-1 ) ( -x+2 ) - 2x2 = 0
b) ( x-1 ) (x-3) (x+1) - ( x-4 ) (x2-1) = 0
c) ( 2x - 5 )- x2 - 25 = 0
Tìm x biết:
a) (x-3).(x2+3x+9) + (x+2).(2-x) = 1
b) x3-8-(x-2).(x2+3) = 0
c) (2x+1)3-(x-2)3 = 0
Tìm x biết (x+2)(x^2-2x+4)=(x-1)^3+3(x+1)^2
1. Tính:
a)(x+4) (x^2 - 4x+16)
b)(x-3y) (x^2 - 3xy+2y^2)
c)(x-3)^2 -(x+3)^3
d)(x^2-1)^3 - (x^2 +1)^3
2. Tìm x, biết:
a) (x+2) (x^2 -2x+4) - x (x^2 +2)=0
b)(x^2-1)^3 - (x^4 +x^2 +1) (x^2-1) =0
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