a: Sửa đề: 6x^3
\(\dfrac{6x^3-4x^2+3x-2}{3x-2}=\dfrac{2x^2\left(3x-2\right)+3x-2}{3x-2}=2x^2+1\)
b: \(\dfrac{6x^3-3x^2+4x+2}{3x^2+2}\)
\(=\dfrac{6x^3+4x-3x^2-2+4}{3x^2+2}\)
\(=2x-1+\dfrac{4}{3x^2+2}\)
B1 :Tính
a) (6x^4 - 4x^2 + 3x -2) : (3x - 2)
b) (6x^3 +3x^2 +4x+2) : (3x^2+2)
c) (x^5 +4x^3 +3x^2 - 5x +15 ): ( x^3 -x +3
Tính:
\(a)\left(-2x^2\right)\cdot\left(3x-4x^3+7-x^2\right)\)
\(b)\left(x+3\right)\cdot\left(2x^2-3x-5\right)\)
\(c)\left(-6x^5+7x^4-6x^3\right):3x^3\)
\(d)\left(9x^2-4\right):\left(3x+2\right)\)
\(e)\left(2x^4-13x^3+15x^2+11x-3\right):\left(x^2-4x-3\right)\)
Bài 5: Cho đa thức A = 3x ^ 3 - 4x + 1 Tim đa thức B biết: a) B / A = 5x + 3 b) A. B = 3x ^ 4 + 6x ^ 3 - 4x ^ 2 - 7x + 2
: Tìm x, biết:
a) 3x( 4x- 1) - 2x(6x- 3 )=30 b) 2x(3-2x) + 2x(2x-1)=15
c) (5x-2)(4x-1) + (10x +3)(2x - 1)=1 d) (x+2) (x+2)- (x -3)(x+1) = 9
e) (4x+1)(6x-3) = 7 + (3x – 2)(8x + 9) g) (10x+2)(4x- 1)- (8x -3)(5x+2) =14
(3/4x+5)+(2/3x-4)-(1/6x+1)=(1/3x+4)-(1/3x-3)
cho hai đa thức : P(x) = 2x^4 + 3x^3 + 3x^2 - x^4 - 4x + 2 - 2x^2 + 6x và Q(x) = x^4 + 3x^2 + 5x - 1 - x^2 - 3x + 2 + x^3 . tính P(x) + Q(x) .
bài 1 Tim x a, 0,6x(x-0,5)-0,3x(2x+1,3)=0,138. , b, 3x2-3x(-2+x)=36. c, 2.(5x-8)-3(4x-5)=4(3x-4)+11 d, 1/3x2-4x+2x(2-3x)=0. e, 5x-3{4x-2(5x-2)]}=182 bài 2 thực hiện phép tính a, (-2x3-1/4y-4yz)8xy2 c,-6x+3(7+2x) e, 1/3xz(-9xy+15yz)+3x2(2yz2-yz)
Thực hiện phép chia:
a) \((3x^5-9x^6+12x^9):3x\)
b) \((6x^4+4x^3+8x^2):(2x)\)
c) \((8x^6+16x^5-10x^4):(2x^4)\)
d) \((4x^4+6x^5+14x^7):(2x^3)\)
Tìm MIN, MAX
A=x^2-4x+10
B=(1-x).(3x+4)
C=3x^2-9x+5
D= - 2x^2+5x+2
E=-3x^2-6x+5
F=x^4-2x^2+3
G=(x^2+2)^2-3
H=x^2+y^2-6x+4y+12
