\(=10x^2+2x-15x-3-10x^2-2x+70x+14\)
\(=55x+11\)
\(=10x^2+2x-15x-3-10x^2-2x+70x+14\)
\(=55x+11\)
Tìm x , biết :
a) ( 3x -1 ) (2x+7) - ( x +1) (6x-5 ) = 16
b) ( 10x +9 )x - ( 5x -1 ) (2x+3 )= 8
c) ( 3x - 5 ) ( 7- 5x ) + ( 5x +2 )( 3x-2 ) -2 = 0
d) x(x + 1) ( x+6 ) - x3 = 5x
Thu gọn biểu thức:
A= x(10x+7)-(5x-1)(2x+3)+13x
Tìm x biết : a.3x.(x+1)-2x.(x+20=-1-x
b.(3x-1).(2x+7)-(x+1).(6x-5)=16
c.(10x+9).x-(5x-1).(2x+3)=8
Tìm x biết:
a, 4x(5x+2)-(10x-3)(2x+7)=133
b, 3(6x-5)(4x+1)-(8x+3)(9x-2)=203
Mọi ng giúp mk nha
Tính :
A) 2x.(x+1)
B) (5x - 6y)(x - 2)
C) (10x^4y^2 - 5x^3y^2 + 15xy^4) : 5xy
D) 2x(x+y) - 3(x+y)
E) 4x^2 - 49
Chứng minh
x(x+2) - 2x-4 = 0
Tính :
A) 2x.(x+1)
B) (5x - 6)(x - 2)
C) (10x^4y^2 - 5x^3y^2 + 15xy^4) : 5xy
Phân tích đa thức thành nhân tử :
D) 2x(x+y) - 3(x+y)
E) 4x^2 - 49
Tìm x :
x(x+2) - 2x-4 = 0
Tìm x:
a, 3.(2x-1).(3x-1)-(2x-3).(9x-1)-3=-3
b, (3x-1).(2x+7)-(x+1).(6x-5)=(x+2)-(x-5)
c, (6x-2)2+(5x-2)2-4.(3x-1).(5x-2)=0
d, (x+3)2-(x-4).(x+8)=1
e, 3.(x+2)2+(2x-1)2-7.(x+3).(x-3)=36
1. (2x +3) (x- 5) +(X-4 ) + (x-5) ( x-2 0 = (3x -5) ( x-4)
2. (8x-3) (3x +2) - (4x+ 7) (x+4) = (2x + 1) (5x-1)
3. 2x^2 + (x -1) (x+1)= 5x (x+10
4. 4- ( x-1) (x+5) - (x+2) (x+5) = 3(x-1) (x+2)
a. ( 5 - 2x ) ( 5x + 2x ) + 2x ( x + 3 ) = 4 - 2x² b. ( 3x - 2 )( -2x) + 5x² = -x( x - 3) c. 7 - ( 3 + 2x ) (2x - 3 ) = ( x + 4 )²