Thực hiện phép tính:
a,4.(x+3)/3x2-x : x2+3x/1-3x
b, x+1/x2-2x-8 . 4-x/x2+x
c, 9x+5/2(x-1)(x+3)2- 5x-7/2(x-1)(x+3)2
d, 18/(x-3)(x2-9)-3/x^2-6x+9-x/x^2-9
e, 1/x2-x+1+1/1-x2+2/x3+1
Thực hiện phép tính:
a)2x(3x2 - 5x + 3) b)-2x2(x2 + 5x - 3) c)-1/2x2(2x3 - 4x + 3)
d) (2x - 1)(x2 +5- 4) c) 7x(x - 4) - (7x + 3)(2x2 - x + 4).
Thực hiện phép tính:
a, (2x-5)(5-x)
b, \(\dfrac{1}{3x-2}\)-\(\dfrac{1}{3x+2}\)
c, \(\dfrac{3}{x-3}\)-\(\dfrac{6x}{x^2-9}\)+\(\dfrac{x}{x+3}\)
Thực hiện phép tính:
a)(2x-3)2+(2x+3).(5-2x)
b)3.(2x-3)+5.(x+2)
c)3x.(2x-8)+(6x-2).(5-x)
d)(x-3).(x+3)-(x-5)2
e)(x-y)3-(x-y).(x2+xy+y2)
1. (x3 – 3x2 + x – 3) : (x – 3) 2. (2x4 – 5x2 + x3 – 3 – 3x) : (x2 – 3) 3. (x – y – z)5 : (x – y – z)3 4. (x2 + 2x + x2 – 4) : (x + 2) 5. (2x3 + 5x2 – 2x + 3) : (2x2 – x + 1) 6. (2x3 – 5x2 + 6x – 15) : (2x – 5)
Bài 1. Thực hiện phép tính:
a) 2xy(x2+ xy - 3y2)
b) (x + 2)(3x2 - 4x)
c) (x3 + 3x2 - 8x - 20) : (x + 2)
d) (x + y)2 + (x – y)2 – 2(x + y)(x - y) e) (a + b)3 - (a – b)3 – 2b3
f) 2x2(x – 2)+ 3x(x2 – x – 2) –5(3 – x2)
g) (x – 1)(x – 3) – (4 – x)(2x + 1) – 3x2 + 2x – 5
Thực hiện phép tính:
a) x.(x+2); b) (3xy-8).(5xy+5); c) (1+x).(x-1); d) (2x-1).(x^2+5-4); e) (6x^5y^2 - 9x^4y^3 + 15x^3y^4): 3x^3y^2 f) (2x3 - 21x2 + 67x - 60) : (x - 5)
1) Rút gọn C = ( 3x- 5) ( 2x + 11 ) - (2x + 3) ( 3x + 7)
2) Thực hiện phép tính ( 2x4+ 2x3 - 7x2 -x +3) : ( 2x2 - 1)
3) Tìm x : ( x+ 4) ( x2 - 4x + 16) - x ( x- 5) (x+ 5) = 264
Bài 1. Thực hiện các phép nhân a) 4x(3x – 1) – 2(3x + 1) – (x + 3)
b) 3x(4x – 3) – (2x – 1)(6x + 5)
c) 4x(3x2 – x) – (2x + 3)(6x2 – 3x + 1)
d) (x – 2)(x + 2)(x2 + 4)
Thực hiệp phép tính:
a) (x2 + 1) (5 - x)
b) (x - 2) (x2 + 3x - 4)
c) (x - 2y)2
d) (2x2 + 3)2