(x-3)^@Taurus-kim ngưu-16/5
(x-3)^@Taurus-kim ngưu-16/5
bài 3 tìm x
a)(2x+3)^2-(2x+1)(2x-1)=32
b)(4x+3)(4x-3)-(4x-5)^2=46
c)(x+4)^2+(x+3)(x-3)-5(x+1)(x-1)=16
d)92x-1)^2+(x+3^2-5(x+7)(x-7)=0
e)25x^2-9=0
Rút gọn
\(\frac{x^3-53x+88}{\left(x-1\right)\left(x-3\right)\left(x-5\right)\left(x-7\right)+16}\)
tìm x
a) ( 3x-1)(2x+7)-(x+1)(6x-5)=16
b) (10x+9)x-(5x-1)(2x+3)=8
c) x.(x+1)(x+6)-x3=5x
d) (3x-5)(7-5x)+(5x+2)(3x-2)-2=0
Tìm giá trị nhỏ nhất của các biểu thức sau :
B = (x-2)(x-3)(x-4)(x-5)+6
C = \(x^2+xy+y^2-3x-3y+16\)
D = (x-1)(x-2)(x-3)(x-4)-5
Tìm x
A) (2x+5)(2x-7)-(-4x-3)^2=16
B) (8x^2+3)(8x^2-3)-(8x^2-1)^2=22
C) 49x^2+14x+1=0
D) (x-1)^3-x(x-2)=0
Tìm x
Bài 1
1.(x-3)(x+2)-x(x-7)=15
2.(x-5)(x+5)+x(3-x)=20
3.(x-7)2-x(2+x)=-7
4.(x-4)2-(x+4)(x-4)=-16
5.(x-5)(x+5)-x(2-3x)=4x2-7
Bai2
1.2x(x-2)+3x-6=0
2.3x(x-5)-5x+25=0
3.x(x+7)-x-7=0
4.(5x-20)+3x2-12x=0
5.(1-x)-3x2+3x=0
I : Tìm x
1) 3x(x-5)-(3x+2)(3x-2)=31
2) (3x-1)(2x+7)-(x+1)(6x-5)=16
II: CMR
B=n(n+5)-(n-3)(n+20 chia hết cho 6 ( vs mọi N thuộc Z )
- Tìm x
a. ( 2x - 5 ) . (12x + 1 ) - ( 3x + 7 ) . (8x - 6 ) = 12
b. 4.(18-5x-12 ) . (3x-7 ) = 15.(2x-16 ) - 6.( x+14)
c. 5.(3x-5 ) - 4(2x-3) = 5x + 3 .(2x + 12) + 1
---------GIÚP MÌNH VỚI NHÁ , MÌNH CẦN GẤP ------
bài 3:
a) 27-x3/5x+5 : 2x-6/3x+3
b) (4x2-16) : 3x+6/7x-2
c) 3x3+3/x-1 : (x2-x+1)
d) 4x+6y/x-1 : 4x2+12xy+9y2/1-x3