\(\left(2x+3\right)\left(x-5\right)+2x\left(3-x\right)+x-10\)
\(=2x^2-10x+3x-15+6x-2x^2+x-10\)
\(=-25\)
\(\left(2x+3\right)\left(x-5\right)+2x\left(3-x\right)+x-10\)
\(=2x^2-10x+3x-15+6x-2x^2+x-10\)
\(=-25\)
Tìm x biết:
a) x(x-3)+2x-6=0
b) (x+1)2-4(x+1)=0
c) (2x+5)(4x+3)-8x(x+3)=10
c)3x^2-7x-10=0
d)2x(x-10)-x+10=0
e)3x^3+7x^2+17x+5=0
f)(2x-1)^2-(x-3)^2=0
g)x^3-5x^2+8x=4
Phân tích đa thức
A, X2+9y2-y4-6xy b, 2x2-x-28
Rút gọn
a, 2x(x2-2x+3)-2x3 b, 2x(x-3)-(x+5)(2x-1) c, (5-x)2+(x+5)2-(2x+10)(x-5)
Tìm x
a, x-2=(x-2)2 =0 b, (-3x+9)x2-7x +21=0
(2x+5)(4x+3)-8x(x-3)=10
j) (2x – 1)(3x + 1) – (4 – 3x)(3 – 2x) = 3
k) (2x + 1)(x + 3) – (x – 5)(7 + 2x) = 8
m) 2(3x – 1)(2x + 5) – 6(2x – 1)(x + 2) = - 6
tìm X nhé
Phan tich da thuc sau thanh nhan tu ( giup minh voi cac ban oi :<< )
1/ x3 + 2x + x2
2/ 2x3 + 4x2 + 2x
3/ -3x3 - 5x2 + 8x
4/ x2 + 4x - 5
5/ 6x2 - 3x - 3
6/ 3x2 - 2x -5
7/ 3x2 - 2x -5
8/ x2 - 2x - 4y2 - 4y
9/ x3 + 2x2y + xy2 - 9x
10/ x2 - y2 + 6x +9
Tìm x:
a) x^3 - 25x = 0
b) (2x + 3)^2 = (x+4)^2
c) (2x-1)^2 - (2x-5)(2x+5) = 18
d) x^3 - 8 = (x-2)^3
Tìm x , biết :
a) (3x -1)(2x+7) -(x+1)(6x-5) =16
b) (2x +3)2-2(2x+3)(2x-5)+(2x-5)2= x2+6x+64
c) (x4+2x3+10x-25): (x2+5)=3
a) x(2x - 1) - (x - 2)(2x + 3) = 5
b) (x - 3)2 - 25 = 0
c) (x - 1) (2 - x) + (x + 3)2 = 4 - 2x
phân tích đa thức thành nhân tử
a) 4x (a-b) +6xy(b-a)
b) (6x+3) - ( 2x-5) (2x+1)
c) 4 ( x-3)^2 +2x (3-x)
d) x^4 +2x^2 -4x-4
e) 2x (x+y) -x -y
g)( 3x-1 )^2 - (x+3)^2