\((x+3)(x^2-3x+9)\)
\(=(x+3)(x^2-x.3+3^2)\)
\(=x^3+3^3\)
\(=x^3+27\)
Đúng 2
Bình luận (5)
Các câu hỏi tương tự
1: 3/x+1 + 2/x+2 = 5x+4/x2+ 3x + 2
2: 2/3x + 1 - 15/6x2-x-1 = 3/2x - 1
3: 9/3x - 1 - 5-x/3x2-4x+1 = 4/x+ 1
4:5/x - 2 + 2/x+4 = 3x/x2 + 2x - 8
5: 4/x+6 + 1/x - 3 = 9/x2 + 3x - 18
6:x/x-3 - 2x2 +9/2x2 - 3x - 9= 1/2x + 3
Rút gọn
(x^4-3x^2+9).(x^2+3)-(3+x^2)
(x-3)^3-(x-3).(x^2+3x+9+6.(x+1)^2
Tìm x
(x-2)^3-(x-3).(x^2+3x+9)+6.(x+1)^2=49
(x+2).(x^2-2x+4-x.(x^2+2)=15
Tìm x :
a) x (3x + 1) + (x -1)2 - (2x + 1)(2x -1) = 0
b) (x + 1)3 + (2 - x)3 - 9(x - 3)(x+3) = 0
c) (x - 1)3 - (x + 3)(x2 - 3x + 9) + 3x2 = 25
d) (x + 2)3 - ( x +1)(x2 - x + 1) - 6(x - 1)2 = 23
e) (x + 3)(x2 - 3x + 9) - x(x - 2)(x+2) + 11 = 0
f) x(x - 3) - x + 3 = 0
(9/x^3-1/x+3) : (x-3/x^2+3x -x/3x+9)
C)(2x-3)2-(2x-3)(x-10)=7
d)(3x-4)2-9(x-3)(x+3)=8
e)(3x-5)(5-3x)+9(x+1)2=30
f)(x+4)2-(x+1)(x-1)=16
Mình cần gấp
Tìm x
b) (x-5) (x-4) - (x+1)(x-2)=7
c) (3x-4)(x-2)=3x(x-9)-3
d)(x-3)(x^2+3x+9)+x(5-x^2)=6x
e) (3x-5)(x+1)-(3x-1)(x+1)=x-4
Tính :
B=(x-3)3-(x+3).(x2-3x+9)+(3x-1).(3x+1)
C=(3x+2)3-18x.(3x+2)+(x-1)3-28x3+3x.(x-1)
Bài 1: Tìm x:
1) (x-3)3 -( x-3)(x2+ 3x+9) +6( x+1)2+ 3x2 = -33
2) (X-3)( X2+ 3X+9) - X(X-2)( 2+X) = 1
3) (X+2)(X2 - 2X+4) – X(X-3)(X+3) = 26
B=(x-3)3-(x+3).(x2-3x+9)+(3x-1).(3x+1)
C=(3x+2)3-11818x18x .(3x3x+2)+(x-1)3 - 28x3+3x.(x-1)
P=(x+3)^3-x.(3x+1)^2+(2x+1)(4x^2-2x+1)-3x^2
Q=(x-3)^3-(x-3)(x^2+3x+9)+6(x+1)^2+3x^2