a) (x - 3)(2x + 5)
= 2x2 + 5x - 6x - 15
= 2x2 - x - 15
b) (x2y3 + 18x2y2 - 3xy2) : 9xy2
= 9xy + 2x - \(\frac{1}{3}\)
Trần Tuyết Tâm
Thực hiện phép chia:
a. (-2x^5+3x^2-4x^3):2x^2
b .(x^3-2x^2y+3xy^2):(-1/2x)
c. (3x^2y^2+6x^2y^3-12xy^2):3xy
d. (4x^3-3x^2y+5xy^2):0,5x
e. (18x^3y^5-9x^2y^2+6xy^2):3xy^2
f. (x^4+2x^2y^2+y^4):(x^2+y^2)
Thực hiện phép tính:
a) ( 5x4 – 3x3 + x2 ):3x2 b) ( 5xy2 + 9xy – x2 y2) : ( -xy)
c) (\(x^3y^3-\dfrac{1}{2}x^2y^3-x^3y^2\)) :\(\dfrac{1}{3}x^2y^2\) d)\(\left(x^3-2x^2y+3xy^2\right):\left(-\dfrac{1}{2}x\right)\)
e) (30x4y3 - 20x2y3 + 6x4y4) : 5x2y3
Bài 1: Thực hiện các phép tính sau:
a)-2xy^2(x^3y-2x^2y^2+5xy^3)
b)(-2x)(x^3-3x^2-x+1)
c)(-10x^3+2/5y-1/3z)(-1/2zy)
d)3x^2(2x^3-x+5)
e)(4xy+3y-5x)x^2y
f)(3x^2y-6xy+9x)(-4/3xy)
Thực hiện phép tính:
a) \(\dfrac{2}{5}xy\left(x^2y-5x+10y\right)\)
b) \(\left(x^2-1\right)\left(x^2+2x+y\right)\)
c) \(\left(x+3y\right)^2\)
d) \(\left(4x-y\right)^3\)
e) \(\left(x^2-2y\right)\left(x^2+2y\right)\)
g) \(18x^4y^2z:10x^4y\)
h) \(\left(x^3y^3+\dfrac{1}{2}x^2y^3-x^3y^2\right):\dfrac{1}{3}x^2y^2\)
i) \(\left(6x^3-7x^2-x+2\right):\left(2x+1\right)\)
k) \(\dfrac{5x-1}{3x^2y}+\dfrac{x+1}{3x^2y}\)
l) \(\dfrac{3x+1}{x^2-3x+1}+\dfrac{x^2-6x}{x^2-3x+1}\)
m) \(\dfrac{2x+3}{10x-4}+\dfrac{5-3x}{4-10x}\)
n) \(\dfrac{x}{x^2+2x+1}+\dfrac{3}{5x^2-5}\)
o) \(\dfrac{x^2+2}{x^3-1}+\dfrac{2}{x^2+x+1}+\dfrac{1}{1-x}\)
p) \(\dfrac{4x+2}{15x^3y}\dfrac{5y-3}{9x^2y}+\dfrac{x+1}{5xy^3}\)
q) \(\dfrac{2x-7}{10x-4}-\dfrac{3x+5}{4-10x}\)
r) \(\dfrac{3}{2x+6}-\dfrac{x-6}{2x^2+6x}\)
x) \(\dfrac{4y^2}{11x^4}.\left(-\dfrac{3x^2}{8y}\right)\)
y) \(\dfrac{x^2-4}{3x+12}.\dfrac{x+4}{2x-4}\)
z) \(\left(x^2-25\right):\dfrac{2x+10}{3x-7}\)
t) \(\left(\dfrac{2x+1}{2x-1}-\dfrac{2x-1}{2x+1}\right):\dfrac{4x}{10x-5}\)
w) \(\left(\dfrac{1}{x^2+x}-\dfrac{2-x}{x+1}\right):\left(\dfrac{1}{x}+x-2\right)\)
a) cho hai đa thức: A = x^2+5xy—3y^2; B=2x^2—3xy+11y^2.tính A+B b) thực hiện phép tính chia (9x^3y^2—12x^2y+15xy) : (3xy)
thực hiện phép tính:
a,\(\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
b,\(\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
c,\(\left(x^2-xy\right):x-+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
Thực hiện phép trừ:
a) 3/x-2-2/x+2
b) 5/2x-3 + 2/2x+3 -2x+5/9-4x^2
c) 2y - 6xy+2y/3x+2y + 2y-9x^2/3x+2y
Thực hiện phép nhân sau
1)-xy(x^2 + xy - y^2)
2) -5x^2y(2y^2-xy)
3)(-2x^3 - 1/4y - 4y^2)8xy^2
4)(2x^3-3xy +12x).(-1/6xy)
