a) \(\left(x-3\right)\)\(\left(x^2+3x+9\right)\)+\(x\left(x+2\right)\left(x-2\right)\) =1
\(\Leftrightarrow x^3\)\(-27\)+\(x\left(x^2-4\right)\) =1
\(\Leftrightarrow\)\(x^3\)\(-27\)\(+x^3\)\(-4x\) =1
\(\Leftrightarrow\)\(2x^3\)\(-4x-27\) = 1
Suy ra \(x\) =2,685673906
Tìm x biết
a, ( x - 2)2 - (x - 3)(x+3) = 6
b, 4( x - 3)2 --(2x - 1)(2x + 1)= 10
c, ( x - 4)2 - x (x -2(x + 2) = 6
d, 9( x + 1)^2 -(3x -2)(3x+ 2)= 10
Bài 1: Tìm x biết
a) x. ( x+4) . ( 4 - x ) + ( x-5 ) . ( x2 +5x + 25 ) = 3
b) ( x+1 )3 - ( x-1 )3 - 6 . ( x-1 )2 = -10
c) ( x-3 ) . ( x2 + 3x + 9 ) + x. ( x+2 ) . ( 2-x ) = 1
Tìm x biết
a) x. ( x+4) . ( 4 - x ) + ( x-5 ) . ( x2 +5x + 25 ) = 3
b) ( x+1 )3 - ( x-1 )3 - 6 . ( x-1 )2 = -10
c) ( x-3 ) . ( x2 + 3x + 9 ) + x. ( x+2 ) . ( 2-x ) = 1
Bài 1 Rút gọn biểu thức
a, [(3x - 2)(x + 1) - (2x + 5)(x2 - 1)] : (x + 1)
b, (2x + 1)2 - 2(2x + 1)(3 - x) + (3 - x)2
c, (x - 1)2 - (x + 1) (x2 - x + 1) - (3x + 1)(1 - 3x)
d, (x2 + 1)(x - 3) - (x - 3)(x2 + 3x + 9)
e, (3x +2)2 + (3x - 2)2 - 2(3x + 2)(3x - 2) + x
Bài 2 Phân tích các đa thức sau thành nhân tử
1, 3(x + 4) - x2 - 4x
2, x2 - xy + x - y
3, 4x2 -25 + (2x + 7)(5 - 2x)
4, x2 + 4x - y2 + 4
5, x3 - x2 - x + 1
6, x3 + x2y - 4x - 4y
7, x3 - 3x2 + 1 - 3x
8, 2x2 + 3x - 5
9, x2 - 7xy + 10y2
10, x3 - 2x2 + x - xy2
Bài 1: Tìm x biết
a) x. ( x+4) . ( 4 - x ) + ( x-5 ) . ( x2 +5x + 25 ) = 3
b) ( x+1 )3 - ( x-1 )3 - 6 . ( x-1 )2 = -10
c) ( x-3 ) . ( x2 + 3x + 9 ) + x. ( x+2 ) . ( 2-x ) = 1
Làm nhanh giùm mình nha
Rút gọn : \(\left[\left(x^3-1-\frac{7-x^3}{3+x^3}\right).\frac{4}{x^5+3x^2}\right]:\left[\frac{3x^6-12}{x^9+6x^6+9x^3}.\frac{x}{3x^3+6}\right]\)
Giải phương trình
a) (3x-1)2+(5-x)(3x-1)=0
b) (x+3)(2-3x)=x2+6x+9
c) (x-1) ( x2 +5x+2)( x3 -1)=0
d) x2 +( x+3)(10-2x)=9
Tìm x :
a) x^3 - \(3x^2\) + 3x - 1 = 8
b) ( x - 2 )^3 + 6( x + 1 )^2 - x^3 = -12
