d,5x+10/4x-8.4-2x/x+2
Bài 2: rút gọn
a, 6x ² y ³/8x ³y ²
b, x ³-x/3x+3
c, x ²+3xy/x ²-9y ²
d, x ²+4x+4/3x+6
Bài 3: Thực hiện phép tính
a, (x/x-3+(9-6x/x ²-3x)
b, 1/x-1/x+1
c, (x-12/6x-36)+(6/x ²-6x)
d, (6x-3/x):(4x ²-1/3x ²)
e, (x+y/2x-2y)-(x-y/2x+2y)-(y ²+x ²/y ²-x ²)
f, 7x+6/2x(x+7)-3x+6/2x ²+14x
g, (2/x+2-4/x ²+4x+4):(2/x ²-4+1/2-x)
Tìm x biết
a) 3x(2x+3)-(2x+5)(3x-2)=8
b) (3x-4)(2x+1)-(6x+5)(x-3)=3
c) 2(3x-1)(2x+5)-6(2x-1)(x+2)= - 6
d) 3xy(x+y)-(x+y)(x2+y2+2xy)+y3=27
Bài 3: Thực hiện phép tính
a, (x/x-3+(9-6x/x ²-3x)
b, 1/x-1/x+1
c, (x-12/6x-36)+(6/x ²-6x)
d, (6x-3/x):(4x ²-1/3x ²)
e, (x+y/2x-2y)-(x-y/2x+2y)-(y ²+x ²/y ²-x ²)
f, 7x+6/2x(x+7)-3x+6/2x ²+14x
g, (2/x+2-4/x ²+4x+4):(2/x ²-4+1/2-x)
1) Rút gọn
x2 + 4x +4 \ 3x + 6 ; 12x + 3x \ 2x(x + 4)
2) Quy đồng mẫu
a/ 6 \ x2 + 4x ; 3 \ 2x + 8
b/ 1 \ x + 2 ; 1 \ (x + 2)(4x +7)
c/ y - 12 \ 6y - 36 ; 6 \ y2 - 6y
d/ 1 \ x + 3 ; 1 \ (x + 3)(x + 2) ; 1 \ (x + 2)(4x + 7)
a) (x-4)(x+4)-(1+2x)2
b) (3-2y)2-(y-6)(y+6)
c) 3x(x-5)-(x+7)(x-7)
X+1/2x+6+2x+3/x2+3x
3/2x+6-x-6/2x2+6x
x/x-2y+x/x+2y+4xy/4y2-x2
1/3x-2-1/3x+2-3x-6/4-9x2
3/2x2y+5/xy2+y3
x+3/x+1+2x-1/x-1+x+5/x2-1
1/phân tích thành phân tử
a. x^6 - 64
b. x^3+3x^2 + 3x+1- y^3
c. x^3 - 27+ x( x-3)
d, y^6 - 625
2/tìm x biết
a. 25x^2 -1=0
b. 4 (x-1)^2 -9 =0
c. 1/4 -9(x-1)^2 =0
d. 1/16 - ( 2x + 3/4) ^2 =0
1/4 nghĩa là 1 phần 4 á nhé, nhờ giúp đỡ
1) (x^2+x)^2-2(x^2+x)-15
2) (x^2+2x)^2+9x^2+18x+20
3) (x^2+3x+1)(x^2+3x+2)-6
4) x^2+2xy+y^2-x-y-12
5) x^2-16-4xy+4y^2
6) x^4 -3x^3-x+3
7) x^2-10x+16
8) 2x^2+7x+3
9) 3x^2+7x+2
10) 2x^2+5x-3
Phân tích đa thức thành nhân tử
1) x^3 - 7x + 6
2) x^3 - 9x^2 + 6x + 16
3) x^3 - 6x^2 - x + 30
4) 2x^3 - x^2 + 5x + 3
5) 27x^3 - 27x^2 + 18x - 4
6) x^2 + 2xy + y^2 - x - y - 12
7) (x + 2)(x +3)(x + 4)(x + 5) - 24
8) 4x^4 - 32x^2 + 1
9) 3(x^4 + x^2 + 1) - (x^2 + x + 1)^2
10) 64x^4 + y^4
11) a^6 + a^4 + a^2b^2 + b^4 - b^6
12) x^3 + 3xy + y^3 - 1
13) 4x^4 + 4x^3 + 5x^2 + 2x + 1
14) x^8 + x + 1
15) x^8 + 3x^4 + 4
16) 3x^2 + 22xy + 11x + 37y + 7y^2 +10
17) x^4 - 8x + 63
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