=\(3x^2-6x-x^2+9x\)
=2x^2+3x
=x(2x+3)
=\(3x^2-6x-x^2+9x\)
=2x^2+3x
=x(2x+3)
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
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
thu gọn biểu thức B= (x+3y)(x-3y) -y(x+9y) : C=(3x-9)(x^2+3x+9)-3x(x^2-2) Mn giúp em với:(((
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
TÍnh gt biểu thức
Q = (3x – 1)(9 x 2 – 3x + 1) – (1 – 3x)(1 + 3x + 9 x 2 ) tại x = 10
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
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
(9/x^3-1/x+3) : (x-3/x^2+3x -x/3x+9)
Bài 1: Tính, rút gọn a) 2x. (x²-3x + 1) b) (x+2)²-x² c) (x+3)(x²-3x+9)-x³ d) (x+5)( 5-x) + 2x² e) (x-3)(x²+ 3x +9)-x (x-4)(x+4) Bài 2: Viết thành lũy thừa a) y² + 8y + 16 b) 10x - 25-x² c) -x³ + 3x²-3x + 1
rút gọn biểu thức (x^2+3x+9)x(x^2-3x+9)x(x^2-9)
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