(𝑥+1)(𝑥+2)−1(𝑥−3)(𝑥+4)=6
<=> 𝑥2+3𝑥+2−𝑥(𝑥+4)+3(𝑥+4)=6
<=> 𝑥2+3𝑥+2−1𝑥2−4𝑥+3𝑥+12=6
<=> 𝑥2+3𝑥+2−1𝑥2−𝑥+12=6
<=> 3𝑥+14−𝑥=6
<=> 2𝑥=−8
<=> 𝑥=−4(𝑥+1)(𝑥+2)−1(𝑥−3)(𝑥+4)=6
<=> 𝑥2+3𝑥+2−𝑥(𝑥+4)+3(𝑥+4)=6
<=> 𝑥2+3𝑥+2−1𝑥2−4𝑥+3𝑥+12=6
<=> 𝑥2+3𝑥+2−1𝑥2−𝑥+12=6
<=> 3𝑥+14−𝑥=6
<=> 2𝑥=−8
<=> 𝑥=−4Tìm x biết:
1. (x-2)^2-(x-3)(x+3)=6
2. 4(x-3)^2-(2x-1)(2x+1)=10
3. (x-4)^2-(x-2)(x+2)=6
4.9(x+1)^2-(3x-2)(3x+2)=10
5. 3x +2(5-x)=0
6.x(2x-1)(x+5)-(2x^2+1)(x+4,5)=3,5
7, 3x^2-3x(x-2)=36
8. (3x^2-x+1)(x-1) +x^2(4-3x)=5/2
1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)+1/(x-4)(x-5)+1/(x-5)(x-6)=1/10
Phân tích đa thức thành nhân từ
1) (x-1) (x+2) (x+3) (x-6) + 32x^2
2) (x+1) (x-4) ( x+2) ( x-8) +4x^2
3) ( x - 2) ( x-3) ( x-6) (x-4) - 75x^2
bài 1: tìm x
a.(x-2)^2-(x-3)(x+3)=6
b. 4(x-3)^2-(2x-1)(2x+1)=10
c. (x-4)^2-(x-2)(x+2)=6
d. 9(x+1)^2-(3x-2)(3x+2)=10
Tìm x , biết :
a) (x-2)2 - ( x-3 )(x+3) = 6
b) 4(x - 3)2 - (2x-1)(2x+1) = 10
c) 4(x-4)2- (x-2)(x+2) = 6
d) 9( x+1 )2 - (3x-2)(3x+2) =10
Tìm x , biết :
a) (x-2)2 - ( x-3 )(x+3) = 6
b) 4(x - 3)2 - (2x-1)(2x+1) = 10
c) 4(x-4)2 - (x-2)(x+2) = 6
d) 9( x+1 )2 - (3x-2)(3x+2) =10
Câu 1 : Giải phương trình
a. 5(x-3)-4=2(x-1)
b. 5-(6-x)=4(3-2x)
c. (3x+5)(2x+1)=(6x-2)(x-3)
d. (x+2)2 + 2(x-4)=(x-4)(x-2)
Bài 2 : Giải phương trình
a) x/3 - 5x/6 - 15x/12 = x/4 - 5
b) 8x-3/4 - 3x-2/2 = 2x-1/2 + x+3/4
c) x-1/2 - x+1/15 - 2x-13/6 = 0
d) 3(3-x)/8 + 2(5-x)/3 = 1-x/2 - 2
e) 3(5x-2)/4 - 2 = 7x/3 - 5(x-7)
Bài 3 Giải phương trình
a) (5x-4)(4x+6)=0
b) (x-5)(3-2x)(3x+4)=0
c) (2x+1)(x2+2)=0
d) (8x-4)(x2+2x+2)=0
Bài 4 Giải phương trình
a) (x-2)(2x+3)=(x-1)(x-2)
b) (2x+5)(x-4)=(x-5)(4-x)
c) 9x2 -1 =(3x+1)(2x-3)
d) (x+2)2=9(x2-4x+4)
e)4(2x+7)2 -9(x+3)2 =0
Bài 5 Giải phương trình
a) (9x2 -4)(x+1)=(3x+2)(x2 -1)
b) (x-1)2 -1+x2 =(1-x)(x+3)
c) x4 +x3 3+x+1=0
Bài 1
4) (x+3)(x-1)(x-5)(x+15)+64x^2
5) (x+2)(x-4)(x+6)(x-12)+36x^2
6) (x-2)(x-4)(x-5)(x-10)-54x^2
a) 5 - (x - 6) = 4 (3 - 2x)
b) x (x - 2) + 3x = (x + 3)2 + 11
c) (x + 2) (x - 2) + x = (x - 1)2 +1
d) (x + 1)2 - 4 (x - 3) = (x + 1) (x - 5)
f) (x - 3) (x + 4) - 2 (3x - 2) = (x - 4)2
a) x+2/x-2-1/x=2/x*(x-2)
b)2/2x-6+2/2x+2+2x/(x+1)*(3-x)=0
c) x+1/2017+x+2/2016=x+3/2015+x+4/2014
d) x-45/5+x-44/6+x-43/7+x-42/8=4
e) x-3/2011+x+2/2012=x-2012/2+x-2011/3