a: \(\Leftrightarrow2x^2-x+\dfrac{1}{3}-\dfrac{2}{3}x=0\)
\(\Leftrightarrow2x^2-\dfrac{5}{3}x+\dfrac{1}{3}=0\)
\(\Leftrightarrow6x^2-5x+1=0\)
\(\Leftrightarrow6x^2-2x-3x+1=0\)
=>(2x-1)(3x-1)=0
=>x=1/3 hoặc x=1/2
b: \(\Leftrightarrow x\left(x-4\right)+\left(x-4\right)^2=0\)
=>(x-4)(2x-4)=0
=>x=4 hoặc x=2
19 Tìm x, biết
a) (x+2)(x+3)-(x-2)(x+5)=0 ; b) (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4)
c) (8-4x)(x+2)+4(x-2)(x+1)=0 ; d) (2x-3)(8x+2)=(4x+1)(4x-1)-3
2 . ( x³ -1)-2x²(x+2x⁴) +(4x⁵+4)x=6. 3. (X²-4x+16)(x+4)-x(x+1)(x+2)+3x²= 0 4 . ( 8x +2 ) (1-3x) + ( 6x-1)(4x-10) =-50 Đề bài là tìm x nha mn Nhanh giúp mik vs
Đề: Tìm x
a)2x.(3x+5)-x.(6x-1)=33 k)5(x+3)-2x(x+3)=0
b)x(3x-1)+12x-4=0 i)5x(x-2)-(2-x)=0
c)5x(2x+1)-12x-6=0 m)x(x-1)-2(1-x)=0
d)x3-5x2+4x-20=0
e)2x3-5x2+2x-5=0
g)(x-2)3-x(x+1).(x-1)+62=5
a) 9x2-49=0
b) (x+3)(x2-3x+9)-x(x-1)(x+1)-27=0
c) (x-1)(x+2)-x-2=0
d) x(3x+2)+(x+1)2-(2x-5)(2x+5)=0
e) (4x+1)(x-2)-(2x-3)(2x-1)=7
Em cần gấp mong mọi người giúp đỡ
tìm x biết
a) 2x.(x+1) -x2.(x+2) +x3-x+4=0
b)4x. (3x+2) -6x (2x+5) +21(x-1) =0
c) 5x.(12x+7) -3x.(2x-5)=-100
d) x.(x-1) -x2+2x=5
e) 2x3.(2x-3) -x2(4x2-6x+2)=0
giúp với ạ tối nay mình phải nạp bài rồi
Tìm X
a. 2.(x+3)-x2-3x=0
b. (2x+1)2-(x-1)2=0
c. x4-4x-3=0
1. Thu gọn:
a) 5x. (x-3) - x. (5x+1)
b) -3x. (x-1) - x. (x+1) + 4x. (x-2)
c) (3x-1). (x-2) + (x-1). (x+1)
d) (4x-3). (2x-5) - (8x-2). (x-1)
2. Tìm x:
a) 3x. (x-3) - x. (3x-2) = 2
b) -2x. (x+1) - 3. (1-x) + 2x2
c) (x-2). (x+2) + (3.x). (x+1) = 0
d) (2x-1). (x+3)- (x-2). (2x+1) = 10
1. Tìm x:
3(2x-1)(3x-1) - (2x-3)(9x-1) = 0
2(5x-8) - 3(4x-5) = 4(3x-4) +10
(3x+2)(2x+9) - (x+2)(6x+1)
VD: 3(2x-1) = 3 nhân (2 nhân x trừ 1)
2. Chứng minh: (x+9)(x+b) = x^2 + (a+b)x + ab
pls help :(
ai giúp mình câu này đc ko mình cần gấp (ko chắc)
\(a,4x-8/2x^2+1=0 b,x2-x-6/x-3=0 c,x+5/3x-6-1/2=2x-3/2x-4 d,12/1-9x^2=1-3x/1+3x-1+3x/1-3x\)
