Ta có :
\(\left(x+1\right)^2=x+1\)
\(\Rightarrow\left(x+1\right)^2-\left(x+1\right)=0\)
\(\Rightarrow\left(x+1\right)x=0\)
\(\Rightarrow\left[\begin{array}{nghiempt}x=-1\\x=0\end{array}\right.\)
Vậy x = - 1 ; x = 0
Ta có :
\(\left(x+1\right)^2=x+1\)
\(\Rightarrow\left(x+1\right)^2-\left(x+1\right)=0\)
\(\Rightarrow\left(x+1\right)x=0\)
\(\Rightarrow\left[\begin{array}{nghiempt}x=-1\\x=0\end{array}\right.\)
Vậy x = - 1 ; x = 0
Tìm x :
6x(1-3x)+9x(2x-7)+171=0
tập hợp x:x+1/2015+x+2/2014=x+3/2013+x+4/2012
timf cap (x,y) nguyen thoa man
( x-y+2).(x-2) + ( x-y+2) . ( 2-x) = 5
Timf x
a) 3.(x-2) + x. ( x-2) = 0
b) 4x.(x-2) -x +2 = 0
Timf GTNN
a)x2+5y2-2xy+4y+3
b)(x2-2x).(x2-2x+2)
Tính:
a, a/ x^2+ax + a/x^2+3ax+2a^2 + a/x^2+5ax+ 6a^2 + a/x^2 + 7ax+12a^2 + 1/x+4a
b, 1/x^2-x+1 - 1/x^2-x+1 - 2x/x^4-x^2+1 + 4x^3/x^8-x^4+1
Thanks các bạn nha!!
1.Giải phương trình: \(\frac{1}{x^2+9x+20}+\frac{1}{x^2+11x+30}+\frac{1}{x^2+13x+42}=\frac{1}{18}\)
2.Giải phương trình: \(8\left(x+\frac{1}{x}\right)^2+4\left(x^2+\frac{1}{x^2}\right)^2-4\left(x^2+\frac{1}{x^2}\right)\left(x+\frac{1}{x}\right)^2=\left(x+4\right)^2\)
Tìm x : \(\dfrac{1}{x^2-x}+\dfrac{1}{x^2-3x+2}+\dfrac{1}{x^2-5x+6}+\dfrac{1}{x^2-7x+12}=2-\dfrac{1}{4-x}\)
1 .Tính nhẩm
(1-x)3 + 3( x2 - 1 ) ( x +1 ) + 3(x - 1) ( x2+1) + (x+1)3 tại x= 1000
2.Rút gọn biểu thức sau thành bằng hằng đẳng thức
(x-1)3 - 3 ( x-1) (x2 -1)+3(x2 - 1 )(x+1) - (x+1)3