(3x^2-6x):(2-x)
TN
Những câu hỏi liên quan
4x(5x − 2) 7x Ä 3x 2 − 6x + 2ä b) c) 2x(3x + 2) + (4x + 3)(2x − 1) 3x 3 y 2 : x 2 d) Ä x 3 + 4x 3 − 6x 2 ä : 4x 2 e) Ä 3x 2 − 6x ä f) : (2 − x) Ä 6x 2 + 13x − 5 ä g) : (2x + 5) Ä x 3 − 3x 2 + x − 3 ä h) : (x − 3)
A=x+6x^2+7x^2-6x+1
A=(x^2)^2+2x^2.3x+9x^2-1x^2-6x+7
A=(x^2+3x)^2-2.(x^2+3x).1+1
A=(x^2+3x)^2>=0 với mọi x khi x^2=3x-1=0
làm phép chia
1) (x^6 - 2x^4 + 6x^3 - 4x^2) : 6x^2
2) (-2x^5 = 3x^2 - 4x^3) : 2x^2
3) (15x^3 - 10x^2 + x - 2) : (x - 2)
4) (2x^4 -3x^3 - 3x^2 + 6x - 2) : (x^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
Cho đa thức P(x) = 3x ^ 2y - 2x + 5xy ^ 2 - 7y ^ 2 Q(x) = 3xy ^ 2 - 7y ^ 2 - 9x ^ 2y - x - 5 Tính P(x) + Q(x) A. - 6x ^ 2y + 8xy ^ 2 - 14y ^ 2 - 3x - 5 B. 6x ^ 2y + 8xy ^ 2 - 3x - 5 D. 6x ^ 2y - 8xy ^ 2 - 14y ^ 2 - 3x - 5
P(x)+Q(x)
=3x^2y-2x+5xy^2-7y^2+3xy^2-7y^2-9x^2y-x-5
=8xy^2-14y^2-6x^2y-3x-5
=>Chọn A
Đúng 0
Bình luận (0)
LT
2 tháng 5 2023 lúc 8:54
Cho 2 đa thức P(x)=6x^3-3x^2+5x-1
Q(x)=-6x^3+3x^2-2x+7
1).......
2)tính P(x)-Q(x)
3) (-3x^3+15x^2+81x):(-3x)
`1)` Yêu cầu là gì ạ?
`2)`
`P(x)-Q(x)=`\((6x^3-3x^2+5x-1)-(-6x^3+3x^2-2x+7)\)
`= 6x^3-3x^2+5x-1+6x^3-3x^2+2x-7`
`= (6x^3+6x^3)+(-3x^2-3x^2)+(5x+2x)+(-1-7)`
`= 12x^3-6x^2+7x-8`
`3)`
`(-3x^3+15x^2+81x):(-3x)`
`= (-3x^3) \div (-3x) + 15x^2 \div (-3x) + 81x \div (-3x)`
`= x^2-5x-27`
Đúng 2
Bình luận (5)
a) (x^2+4)(x+2)(x-2)-(x^2+3)(x^2-3)
b)(3x-2)(9x^2+6x+4)-3(9x^3-2)
c)(3x+5)^2+(6x+10)(2-3x)+(2-3x)^2
a: \(=\left(x^2+4\right)\left(x^2-4\right)-\left(x^4-9\right)\)
\(=x^4-16-x^4+9=-7\)
b: \(=27x^3-8-27x^3+6=-2\)
c: \(=\left(3x+5+2-3x\right)^2=7^2=49\)
Đúng 0
Bình luận (0)
3x3 - 5x2 + 2 - 3x(2x2 - 1) + 6(x2 - 2x +3) x2 - 5x 3x3 - 5x2 + 2 - 3x.2x2 + 3x + 6x2 - 6.2x + 6.3 x2 - 5x 3x3 - 5x2 + 2 - 6x3 + 3x +6x2 - 12x + 18 - x2 + 5x 0 (3x3 - 6x3) + (6x2 - 5x2 - x2) - (12x - 3x - 5x) + (18 + 2 ) 0 ...
Đọc tiếp
3x3 - 5x2 + 2 - 3x(2x2 - 1) + 6(x2 - 2x +3) = x2 - 5x
<=> 3x3 - 5x2 + 2 - 3x.2x2 + 3x + 6x2 - 6.2x + 6.3 = x2 - 5x
<=> 3x3 - 5x2 + 2 - 6x3 + 3x +6x2 - 12x + 18 - x2 + 5x = 0
<=> (3x3 - 6x3) + (6x2 - 5x2 - x2) - (12x - 3x - 5x) + (18 + 2 ) = 0
<=> ...
KHÓOOOOOOOOOO QUÁAAAAAAA ĐIIIIIIIIIIIIIIIIIIII CHẾTTTTTTTTTTTTT
1 thinh nhan
a(3x-x)(4x-5)-(4x-1)(3x-2)
b2x(6x-2)-3x(4x-1)
2dung dinh nghia phan thuc bang nhau ,chung minh
a)12x^2y/8xy=6x^2y^2/4xy^2
b)2(x-1)/6x=x^2-x/3x^2
kết quả của phép nhân 3x(x^2+2x-1) là:
A.3x^3+5x^2-3x
B.3x^2+6x^3-3x
C.3x^3-3x^2+6x
D.3x^3+6x^2-3x
