Các câu hỏi tương tự
Giải các phương trình tích sau:1.a)(3x – 2)(4x + 5) 0 b) (2,3x – 6,9)(0,1x + 2) 0c)(4x + 2)(x2 + 1) 0 d) (2x + 7)(x – 5)(5x + 1) 02. a)(3x + 2)(x2 – 1) (9x2 – 4)(x + 1) b)x(x + 3)(x – 3) – (x + 2)(x2 – 2x + 4) 0c)2x(x – 3) + 5(x – 3) 0 d)(3x – 1)(x2 + 2) (3x – 1)(7x – 10)3.a)(2x – 5)2 – (x + 2)2 0 b)(3x2 + 10x – 8)2 (5x2 – 2x + 10)2c)(x2 – 2x + 1) – 4 0 d)4x2 + 4x + 1 x24. a) 3x2 + 2x – 1 0 b) x2 – 5x + 6 0c) x2 – 3x + 2 0 d) 2x2 – 6x + 1 0 ...
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Giải các phương trình tích sau:
1.a)(3x – 2)(4x + 5) = 0 b) (2,3x – 6,9)(0,1x + 2) = 0
c)(4x + 2)(x2 + 1) = 0 d) (2x + 7)(x – 5)(5x + 1) = 0
2. a)(3x + 2)(x2 – 1) = (9x2 – 4)(x + 1)
b)x(x + 3)(x – 3) – (x + 2)(x2 – 2x + 4) = 0
c)2x(x – 3) + 5(x – 3) = 0 d)(3x – 1)(x2 + 2) = (3x – 1)(7x – 10)
3.a)(2x – 5)2 – (x + 2)2 = 0 b)(3x2 + 10x – 8)2 = (5x2 – 2x + 10)2
c)(x2 – 2x + 1) – 4 = 0 d)4x2 + 4x + 1 = x2
4. a) 3x2 + 2x – 1 = 0 b) x2 – 5x + 6 = 0
c) x2 – 3x + 2 = 0 d) 2x2 – 6x + 1 = 0
e) 4x2 – 12x + 5 = 0 f) 2x2 + 5x + 3 = 0
Giải các phương trình sau:
g/ x(x + 3)(x – 3) – (x + 2)(x2 – 2x + 4) = 0
h/ (3x – 1)(x2 + 2) = (3x – 1)(7x – 10)
i/ (x + 2)(3 – 4x) = x2 + 4x + 4
k/ x(2x – 7) – 4x + 14 = 0
m/ x2 + 6x – 16 = 0
n/ 2x2 + 5x – 3 = 0
a. (x – 1)(5x + 3) = (3x – 8)(x – 1)
b. 3x(25x + 15) – 35(5x + 3) = 0
c. (2 – 3x)(x + 11) = (3x – 2)(2 – 5x)
d. (2x2 + 1)(4x – 3) = (2x2 + 1)(x – 12)
e. (2x – 1)2 + (2 – x)(2x – 1) = 0
f. (x + 2)(3 – 4x) = x2 + 4x + 4
Tính
1. ( - 4xy ) . ( 2xy2 - 3x2y)
2. ( -5x ) ( 3x3 + 7x2 - x )
3. ( 3x - 2 ) ( 4x + 5 ) - 6x ( 2x -1 )
4. 2x2 ( x2 - 7x + 9 )
5. ( 3x - 5 ) ( x2 - 5x + 7 )
Hãy giải các phương trình sau đây :
1, x2 - 4x + 4 = 0
2, 2x - y = 5
3, x + 5y = - 3
4, x2 - 2x - 8 = 0
5, 6x2 - 5x - 6 = 0
6,( x2 - 2x )2 - 6 (x2 - 2x ) + 5 = 0
7, x2 - 20x + 96 = 0
8, 2x - y = 3
9, 3x + 2y = 8
10, 2x2 + 5x - 3 = 0
11, 3x - 6 = 0
Bài 1: Thực hiện phép tínha)5x3(3x2 – 5x + 3) c)x2 ( 2x3 – 4x + 3)b) -1dfrac{1}{2}x22x – 1)(x2 + 5x – 4) d) (3x – 4)(2x + 4) + (5 – x)(2x2 + 3x – 2)
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Bài 1: Thực hiện phép tính
a)5x3(3x2 – 5x + 3) c)
b) -1\(\dfrac{1}{2}\)x22x – 1)(x2 + 5x – 4) d) (3x – 4)(2x + 4) + (5 – x)(2x2 + 3x – 2)
Bài 1 Rút gọn biểu thứca, [(3x - 2)(x + 1) - (2x + 5)(x2 - 1)] : (x + 1)b, (2x + 1)2 - 2(2x + 1)(3 - x) + (3 - x)2c, (x - 1)2 - (x + 1) (x2 - x + 1) - (3x + 1)(1 - 3x)d, (x2 + 1)(x - 3) - (x - 3)(x2 + 3x + 9)e, (3x +2)2 + (3x - 2)2 - 2(3x + 2)(3x - 2) + xBài 2 Phân tích các đa thức sau thành nhân tử1, 3(x + 4) - x2 - 4x2, x2 - xy + x - y3, 4x2 -25 + (2x + 7)(5 - 2x)4, x2 + 4x - y2 + 45, x3 - x2 - x + 16, x3 + x2y - 4x - 4y7, x3 - 3x2 + 1 - 3x8, 2x2 + 3x - 59, x2 - 7xy + 10y210, x3 - 2x2 + x - xy...
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Bài 1 Rút gọn biểu thức
a, [(3x - 2)(x + 1) - (2x + 5)(x2 - 1)] : (x + 1)
b, (2x + 1)2 - 2(2x + 1)(3 - x) + (3 - x)2
c, (x - 1)2 - (x + 1) (x2 - x + 1) - (3x + 1)(1 - 3x)
d, (x2 + 1)(x - 3) - (x - 3)(x2 + 3x + 9)
e, (3x +2)2 + (3x - 2)2 - 2(3x + 2)(3x - 2) + x
Bài 2 Phân tích các đa thức sau thành nhân tử
1, 3(x + 4) - x2 - 4x
2, x2 - xy + x - y
3, 4x2 -25 + (2x + 7)(5 - 2x)
4, x2 + 4x - y2 + 4
5, x3 - x2 - x + 1
6, x3 + x2y - 4x - 4y
7, x3 - 3x2 + 1 - 3x
8, 2x2 + 3x - 5
9, x2 - 7xy + 10y2
10, x3 - 2x2 + x - xy2
a) x(4x+3y)−(y−2x)2
b) (3+x)(x−3)−(x−1)(x2−3)
c)−2(x−3)2+(x+1)(5x−1)
d) (2x+1)(4x2−2x+1)−3x2(x−2)
e) (3x2+19x+20):(3x+4)
f) (7x2+x3+12x−6):(x2+4x−3)
Thực hiện phép chia:
1. (-3x3 + 5x2 - 9x + 15) : ( 3x + 5)
2. ( 5x4 + 9x3 - 2x2 - 4x - 8) : ( x-1)
3. ( 5x3 + 14x2 + 12x + 8 ) : (x + 2)
4. ( x4 - 2x3 + 2x -1 ) : ( x2 - 1)
5. ( 5x2 - 3x3 + 15 - 9x ) : ( 5 - 3x)
6. ( -x2 + 6x3 - 26x + 21) : ( 3 -2x )