\(\Leftrightarrow x^2-x-2x+2=0\)
\(\Leftrightarrow x\left(x-1\right)-2\left(x-1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(x-2\right)=0\)
\(\Leftrightarrow\int^{x=1}_{x=2}\)
Giải phương trình
a) \(x^2-2x+1=0\)
b)\(1+3x+3x^2+x=0\)
c)\(x+x^4=0\)
d)\(x^3-3x^2+3x-1+x\left(x^2-x\right)=0\)
e)\(x^2+x-12=0\)
g)\(6x^2-11x-10=0\)
1).(4-3x)(10-5x)=0 2).(7-2x)(4+8x)=0 3).(9-7x)(11-3x)=0
4).(7-14x)(x-2)=0 5).(\(\dfrac{7}{8}\)-2x)(3x+\(\dfrac{1}{3}\))=0 6).3x-2x\(^2\)
7).5x+10x\(^2\)
c)(x-1)^2=4
d)x^3+2x^2-x-2=0
e)(3x+2)^2-(2x-1)^2=0
a) 3x^2-2x-8=0
b)2x^3-3x^2+3x+8 =0
g) ( x+2)^2-(2x-1)^2=(3x+1)^2
h)2x^2-3=0
i)2x^2+x+3=0
a, x^2 +2 /2 -3x >0
b, -5x +3 / x^2 +3x +7 >/ 0
c, 5-4x / 2x^2 +1 <0
d, 5/x^2 -3x +2 < 0
e,3x+2 / x^2+4x+4 >0
f,7x -14 ? -(x+2) ^2 -1 < 0
1) (4-3x) (10x-5)=0
2) (7-2x) (4+8x) = 0
3) (9-7x) (11-3x) = 0
4) (7-14x) (x-2) = 0
5) (2x+1) (x-3) = 0
6) (8-3x) (-3x+5) = 0
7) (16-8x) (2-6x) = 0
8) (x+4) (6x-12) = 0
9) (11-33x) (x+11) = 0
10) (x-1/4) (x+5/6) = 0
11) (7/8-2x) (3x+1/3) = 0
12) 3x - 2x^2 = 0
13) 5x + 10x^2 = 0
14) 4x + 3x^2 = 0
15) -8x^2 + x =0
16) 10x^2 - 15x = 0
17) x^2 -4 =0
18) 9 - x^2 = 0
19) x^2 -1 = 0
20) (x-3) (2x-1) = (2x-1) ( 2x+3)
21) (5+4x) (-x+2) = (5+4x) (7+5x)
22) (4+x) (x-5) = (3x-8) (x-5) = 0
23) (3x-8) (7-21x) - (9+2x) (7-21x)
24) (10+ 7x) (x+1) = (9x-2)(x-1)
25) (9x-4) (x-1/2) - (x-1/2) (6+x) = 0
26) 9x^2 - 1 = (3x-1) (x+4)
27) (x+7) (3x+1) = 49-x^2
28) (2x+1)^2 = (x-1)^2
29)x^3- 5x^2+6x = 0
30) 3x^2 + 5x + 2 = 0
Giảii giúpp mìnhh đyy mọii ngườii .
2(x + 3) - x mũ 2 - 3x = 0
(3x - 5 ) mũ 2 - ( x -1) = 0
3x ( x - 5 ) - x mũ 2 +25 = 0
1. Chứng tỏ 2 phương trình sau tương đương :
a. ( x2 - 1 )( x + 2 ) = 0 và x2 - 1 = 0
b. x3 - 3x2 - 1 = 0 và ( x - 1 )3 - 3x = 0
c. x + 2 = 0 và ( x + 2 )( x2 + 1 ) = 0
d. x3 + 3x + 1 = 0 và ( x + 1 )3 - 3x2 = 0
e. x2 - 3x + 9 = 0 và ( x - 3 )2 + 3x = 0
5(x-2)-3x=0
X2-49=0
3x2+7x-18=0
3x(x2-16)=0
Tìm x
a)3x(x-2)+2(2-x)=0
b)5x(3x-1)+x(3x-1)-2(3x-1)=0