Tìm x ≥ 0, biết:
a) 2x-7\(\sqrt{x}\)+3=0
b) 3\(\sqrt{x}\)+5 < 6
c) x-3\(\sqrt{x}\) -10 < 0
d) x- 5\(\sqrt{x}\) +6 = 0
e) x+ 5\(\sqrt{x}\) -14 < 0
\(\left(x-\frac{1}{x}\right)^2-5\left(x-\frac{1}{x}\right)+6=0\)0
\(x+5-5\sqrt{x-1}=0\)
Bài 1: Rút gọn các biểu thức sau: a)√(5+2√5)² - √5 ______ √5+2 b) x-2 √xy + y _______________ X - Y (x khác y , x > hoặc = 0 , y > hoặc = 0 )
Tìm x, biết:
1/ căn x^2 -4 - căn x-2=0
2/ căn x+5=1+căn x
3/ căn x+5+ căn 5-x=0
4/ căn x+5+ căn 5-x=4
5/ căn 3-x+ căn x-5=10
1, \(K=\sqrt{3-\sqrt{5}}+\sqrt{3+\sqrt{5}}\)
2, \(\sqrt{x-3}-2.\sqrt{x^2-3x}=0\)
3, \(\dfrac{9x-7}{\sqrt{7x+5}}=\sqrt{7x+5}\)
4, \(x-5\sqrt{x}+4=0\)
giải pt
a 3x(x-1)+2(x-1)=0
b x^2-1-(x+5)(2-x)=0
c 2x^3 +4x^2-x^2+2=0
d x(2x-3)-4x+6=0
e x^3-1=x(x-1)
f (2x-5)^2 -x^2-4x-4=0
h (x-2)(x^2+3x-2)-x^3+8=0
5+5+8+0+6+4+5+2+4+1+1+2+3+4+5+6+6+7+8+9+100000000+45638+78536 x 12345 x 34 x 0 +100=
1) x-\(7\sqrt{x-3}\) -9=0 2) \(\sqrt{x+3}\) =5-\(\sqrt{x-2}\) 3) \(\sqrt{x-4\sqrt{x+4}}\) =3 4) \(\sqrt{8-\dfrac{2}{3}x}-5\sqrt{2}\) =0 5) \(\sqrt{x^2-4x+4}\) =2-x
Giải phương trình sau
\(x^2-2\sqrt{5}x+5=0
\)
\(4x^4-5x^2-9=0\)
\(\left\{{}\begin{matrix}2\left(x+y\right)^2-5\left(x+y\right)-7=0\\x-y-5=0\end{matrix}\right.\)