\(\left(x-3\right)\left(9+x^2+3x\right)+\left(2+x\right).x\left(-x+2\right)=1\)
\(\Leftrightarrow\left(x-3\right)\left(x^2+3x+3^2\right)+x\left(2+x\right)\left(2-x\right)-1=0\)\(\Leftrightarrow x^3-27+x\left(4-x^2\right)-1=0\)
\(\Leftrightarrow x^3-27+4x-x^3=0\)
\(\Leftrightarrow4x=27\Rightarrow x=\dfrac{27}{4}\)
Bài 7. Tìm x,biết:
a) x-3x2=0 e) 5x(3x-1)+x(3x-1)-2(3x-1)=0
b) (x+3)2-x(x-2)=13 c) (x-4)2-36=0
d) x2-7x+12=0 g) x2-2018x-2019=0
Bài 8. Tìm x, biết
a) (2x-1)2=(x+5)2 b) x2-x+1/4
c) 4x4-101x2+25=0 d) x3-3x2+9x-91=0
Bài 10. Tìm x, biết
a) (x+2)2-x(x+3)+5x=-20 c) (x2-1)3-(x4+x2+1)(x2-1)=0
b) 5x3-10x2+5x=0 d) (x+1)3-(x-1)3-6(x-1)2=-19
Tìm x biết:
a) (x - 3)2 - 5.(x - 2) + 5 = 0.
b) (2x - 1)2 - 3.(x - 2).(x + 2) - 25 = 0.
c) (x - 1)3 - x2.(x - 2) + 5 = 0.
d) x2 - 4x + 5 = 0.
a) x2(x-2)2-(x-2)^2 - x2 +1 b) x3-4x2+8x-8
c)1+6x-6x2-x3
d)x3-y3-3x2+3x-1
e)(x+y+z)^3-x3-y3-z3
Bài tập : Phân tích đa thức thành phân tử
1) 3x - 24y
2) 6x3y2 - 12x2y2 - 3x2y
3) 7x ( x-2) -8 (x-2)
4)5x (x-7) -2 (7-x)
5) x2 - 81
6) - x2 + 16
7 ) 4x2 + 4x + 1
8) -x2 - 25 +10x
9) x2 - x - y2 - y
10) 5x - 5y + x2 - xy
11) x2 + 2xy + y2 - 16
Giúp mình với <3
Bài 1:
a, x^3+5x^2+3x-9
Bài 2:
a, (x^2+x^2)-2(x^2-x)-15
b, (x^2+2x) ^2+9x^2+18x+20
c, (x^2+3x+1)(x^2+3x+2)
Em cần gấp ạ!
1.phân tích đa thức thành nhân tử
ab(x^2+y^2)+xy(a^2+b^2)
ab(x^2+1)+x(a^2+b^2)
x^3-3x^2+3x-1-8y^3
x^4+3x^3-9x-9
x^2+6x-y^2+9
x^2+y^2-z^2-9t^2-2xy+6zt
7x^2-7xy-4x+4y
x^4+3x^3-9x-27
3a^2-6ab+3b^2-12c^2
x^2+3cs(2-3cd)-10xy-1+25y^2
Bài 2 Phân tích thành nhân tử
a) 3x2 – 7x – 10
b) x2 + 6x +9 – 4y2
c) x2 – 2xy + y2 – 5x + 5y’
d) 4x2 – y2 – 6x + 3y
e) 1 – 2a + 2bc + a2 – b2 – c2
f) x3 – 3x2 – 4x + 12
g) x4 + 64
h) x4 – 5x2 + 4
i) (x+1)(x+3)(x+5)(x+7) + 16
j) (x2 + 6x +8)( x2 + 14x + 48) – 9
k) ( x2 – 8x + 15)(x2 – 16x + 60) – 24x2
l) 4( x2 + 15x + 50)(x2 +18x +72) – 3x2
Bài 3 tìm gtnn
A = 9x2 – 6x + 2
B = 4x2 + 5x + 10
C = x2 – x + 10
D = 4x2 + 3x + 20
E = x2 + y2 – 6xy + 10y + 35
F= x2 + y2 – 6x + 4y +2
M= 2x2 + 4y2 – 4xy – 4x – 4y +2021
4(x-3)-8x(x-3)=0
5x(x-7)-10(7-x)=0
2x-8=3x(x-4)
3x(x-5)=10-2x
6x(x-3)-3(3-x)=0
x^2(x+4)+9(-x-4)=0
giup voi dang can gap a
