a) 13 - 2x = x- 2 b)2x-15+8x=7-2x+14 c)12-4y+3y=4y-10-8y
<=>13 + 2 = x+2x <=>2x +2x+8x =7+14+15 <=>12+10 =4y-8y+4y-3y
<=> 15 =3x <=>12x =36 <=> 22 =-3y
<=> x=5 <=>x=3 <=>y=-22/3
vậy S=[5] vậy S=[3] vậy S=[-22/3]
a) 13 - 2x = x- 2 b)2x-15+8x=7-2x+14 c)12-4y+3y=4y-10-8y
<=>13 + 2 = x+2x <=>2x +2x+8x =7+14+15 <=>12+10 =4y-8y+4y-3y
<=> 15 =3x <=>12x =36 <=> 22 =-3y
<=> x=5 <=>x=3 <=>y=-22/3
vậy S=[5] vậy S=[3] vậy S=[-22/3]
1. Phân tích đa thức thành nhân tử
1) y^2-13y+12
2) y^2-13y+12
3) x^2-x-30
4) y^2+y-42
5) x^2+3x-10
6)x^2-8x+15
7) 2x^2-y^2+xy
8) x^2+x-6
9) y^2-y-12
11) x^2+3x+2
12) x^2-3xy+2y^2
13) x^2-5x+6
14) x^4+x^2+2x
15) x^4+4
16) x^4+x^2+1
17) x^2+x-2
Phân tích đa thức thành nhân tử
1) x^3 - 7x + 6
2) x^3 - 9x^2 + 6x + 16
3) x^3 - 6x^2 - x + 30
4) 2x^3 - x^2 + 5x + 3
5) 27x^3 - 27x^2 + 18x - 4
6) x^2 + 2xy + y^2 - x - y - 12
7) (x + 2)(x +3)(x + 4)(x + 5) - 24
8) 4x^4 - 32x^2 + 1
9) 3(x^4 + x^2 + 1) - (x^2 + x + 1)^2
10) 64x^4 + y^4
11) a^6 + a^4 + a^2b^2 + b^4 - b^6
12) x^3 + 3xy + y^3 - 1
13) 4x^4 + 4x^3 + 5x^2 + 2x + 1
14) x^8 + x + 1
15) x^8 + 3x^4 + 4
16) 3x^2 + 22xy + 11x + 37y + 7y^2 +10
17) x^4 - 8x + 63
đúng nhiều nhất sẽ đc tick
Bài1: phân tích đa thức thành nhân tử
1) 21x^2y - 12xy^2
2) x^3 + x^2 - 2x
3) 3x. (x - 1) + 7x^2. (x - 1)
4) 3x. (x-a) + 4a. (a-x)
5) 1/2x. (x-2) + 4a. (a-x)
6) 21. (x-y)^2 - 7.(y-x)
7) x^2yz + xy^2z^2 + x^2yz^2
8) 9x^2y^2 + 15x^2y - 21xy^2
9) x^2y^2 - 1
10) x^4y^4 - z^4
11) (x+1)^2 - 24
12) (x+1)^2 - (y+6)^2
13) x^6 + 1
14) -4y^2 + 4y - 1
15) (2a + 3)^2 - (2a + 1)^2
Bài2: tìm x, biết:
a) x^4 - 16x =0
b) x. (x-3) - x +3 =0
c) 4x^2 - 1/4 =0
d) x^3 - 3x^2 + 3x - 1=0
e) 8x^3 - 36x^2 + 54x - 27=0
f) x^2 + 4x = -4
g) x^2 = 6x - 9
Bài1: phân tích đa thức thành nhân tử
1) 21x^2y - 12xy^2
2) x^3 + x^2 - 2x
3) 3x. (x - 1) + 7x^2. (x - 1)
4) 3x. (x-a) + 4a. (a-x)
5) 1/2x. (x-2) + 4a. (a-x)
6) 21. (x-y)^2 - 7.(y-x)
7) x^2yz + xy^2z^2 + x^2yz^2
8) 9x^2y^2 + 15x^2y - 21xy^2
9) x^2y^2 - 1
10) x^4y^4 - z^4
11) (x+1)^2 - 24
12) (x+1)^2 - (y+6)^2
13) x^6 + 1
14) -4y^2 + 4y - 1
15) (2a + 3)^2 - (2a + 1)^2
Bài2: tìm x, biết:
a) x^4 - 16x =0
b) x. (x-3) - x +3 =0
c) 4x^2 - 1/4 =0
d) x^3 - 3x^2 + 3x - 1=0
e) 8x^3 - 36x^2 + 54x - 27=0
f) x^2 + 4x = -4
g) x^2 = 6x - 9
Giúp mk với, mai mk phải nộp gấp!!
a(15 xy^2z^3 :(3xyz^2)
b(12 x^y^4 : (-4x^4y^2)
c (-15x^2y^3z^2 ) :(-6xz^2)
d(x-y)^5 : (y-x)^3
(x-y)^5 : (y-x)^2
f(3xy-6x)^3 : 9(2x-y)
1) (x^2+x)^2-2(x^2+x)-15
2) (x^2+2x)^2+9x^2+18x+20
3) (x^2+3x+1)(x^2+3x+2)-6
4) x^2+2xy+y^2-x-y-12
5) x^2-16-4xy+4y^2
6) x^4 -3x^3-x+3
7) x^2-10x+16
8) 2x^2+7x+3
9) 3x^2+7x+2
10) 2x^2+5x-3
Phân tích đa thức sau thành nhân tử chung:
1)x3-2x2+x
2)4x3-25x
3)x2+xy+2y-4
4)y3-4y2-8y+8
5)x2-4x+3
6)x2-7x+12
7)x2-5x-14
8)3x2-8x+4
9) (x2+x)2-2(x2+x)-15
10) (x2+3x+1)(x3+3x+2)-6
11)x2-y2-4x+4
12) (x+2)(x+3)(x+4)(x+5)-24
13)x4+4
14)x4+64y4
6) (4x+1/4)^3
7) (3x+2/x)^3
8) (x^2+1/x)^3
9) (x+2/xy)^3
10) (x^2+2/xy)^3
11) (x^2+3/xy)^3
12) (x^2+2/x)^3
13) (3y+x/2)^3
14) (1 1/2xy+1)^3
15) (x^2/2+2/y)^3
16) (x^2+2x)^3
17) (x/5+5)^3
18) (1/y+2x)^3
19) (3x+4)^3
20) (2x+1/x^2)^3
21) (4/x+y)^3
22) (x+3/y)^3
23) (2y+4y)^3
24) (yx/2+2/x^3
25) (x+2/x)^3
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