Phân tích đa thức thành nhân tử (đặt ẩn phụ)
a) (6x+7)^2(3x+4)(x+1)-6
b) (x-2)^2(2x-5)(2x-3)-5
c) (2x-1)(x-1)(x-3)(2x+3)+9
d) (4x+1)(12x-1)(3x+2)(x+1)-4
phân tích
1,(x-2)^4+(x-3)^4-1
2,(x-1)^4+(x+3)^4-512
3,(x-2)^6+(x-4)^6-64
4,x^4-3x^3+6x^2+3x+1
5,3x^4-2x^3-15x^2-2x+3
6,x^6-2x^5-4x^4+6x^3+4x^2-2x-1
1. x^2-y^2-2x+2y 2. x^3-x+3x^2y+3xy^2+y^3-y. 3. 4x^4y^4+1. 4. x^2-2x-4y^2-4y. 5.x^3-x^2-x+1. 6.x^2y-x^3-9y+9x. 7.x^3-2x^2+x-xy^2. 8.x^2-2x-4y^2-4y.
3x(x-5+1)=x(4+3x)
X(2x+1)-x(x-2)=4
2/x+1-2x+1/x^2-x+1=3/x^3+1
Tìm x , biết :
a) (3x -1)(2x+7) -(x+1)(6x-5) =16
b) (2x +3)2-2(2x+3)(2x-5)+(2x-5)2= x2+6x+64
c) (x4+2x3+10x-25): (x2+5)=3
Tìm GTNN:
a. x^2 +6x + 17
b.x^2-8x+20
c.(x-3)(x+6)-3(x+1)
d.(x-4)(x+4)-5(x-3)
e.(x+5)^2+(x-1)^2
f.(x+8)(x-8)-4(x+5)
g.3x^2-x+5
h. 5x^2-11/2x+1
i. 2x^2 +7y^2 biết 3x-y=1
k. 3x^2 +4y^2 biết 2x+5y=3
l. x^2 -xy +y^2- 2x-2y
a) (3x3 — 2x2 + x +2).(5x2)
b) 3x4(-2x3+5x2-2/3x+1/3)
c) (2x —3)(x2 + 2x — 4)
d) (x -3)(x +7)-(x+5)(x-1)
help plssssss
Tìm x:
a)x(2x-4)-(x-2)(2x+3)
b)x(3x+2)+(x+1)^2-(2x-5)(2x+5)=-12
c)(x-1)(x^2+x+1)-x(x-3)^2=6x^2
d)x^2-x=0
e)(x+2)(x-3)-x-2=0
f)3x^3-27x
Giup mik vs nha
phân tích đa thức thành nhân tử
a) 4x (a-b) +6xy(b-a)
b) (6x+3) - ( 2x-5) (2x+1)
c) 4 ( x-3)^2 +2x (3-x)
d) x^4 +2x^2 -4x-4
e) 2x (x+y) -x -y
g)( 3x-1 )^2 - (x+3)^2
