\(\Leftrightarrow x^2+2x+2=0\)
\(\Leftrightarrow\left(x+1\right)^2+1=0\)(vô lý)
\(\Rightarrow-4-x^2+2x+2=0\Leftrightarrow-x^2+2x-2=0\)
\(\Delta'=1-\left(-2\right)=3>0\)
pt có 2 nghiệm pb
\(x_1=1+\sqrt{3};x_2=1-\sqrt{3}\)
\(\Leftrightarrow x^2+2x+2=0\)
\(\Leftrightarrow\left(x+1\right)^2+1=0\)(vô lý)
\(\Rightarrow-4-x^2+2x+2=0\Leftrightarrow-x^2+2x-2=0\)
\(\Delta'=1-\left(-2\right)=3>0\)
pt có 2 nghiệm pb
\(x_1=1+\sqrt{3};x_2=1-\sqrt{3}\)
Giải các phương trình sau:
a \(\left(X^2+2x\right)^2-3\left(x^2+2x\right)+2=0\)
b \(\left(x^2+x\right)\left(x^2+x+1\right)-6=0\)
c \(x^4-4x^3+x+3=0\)
d \(x^4-2x^3+x=2\)
Giải pT
1) x^3-5x^2+3x+1=0
2) x^4-3x^3+4x^2-3x+1=0
3) 3x^3+2x^2-4x-1=0
4) x^4+x^3-13x^2-x+10=0
5) x^4-2x^3-13x^2+14x+24=0
6) 3x^3+x^2-5x-3=0
giải pt
a, 2x^3++3x^2-8x-12=0
b, x^3-4x^2-x+4=0
c,x^3-x^2-x-2=0
d,x^4-3x^3+3x^2-x=0
e,(x+1)(x^2-2x+3)=x^3+1
g,x^3+3x^2+3x+1=4x+4
1) |2x - 1| = 5
2) |2x - 1| = |x + 5|
3) |3x + 1| = x - 2
4) |3 - 2x| = x + 2
5) |2x - 1| = 5 - x
6) |- 3x| = x - 2
7) |2 - 3x| = 2x + 1
8) |2x - 1| + |4x ^ 2 - 1| = 0
9) (2x + 5)/(x + 3) + 1 = 4/(x ^ 2 + 2x - 3) - (3x - 1)/(1 - x)
10) (x - 1)/(x + 3) - x/(x - 3) = (7x - 3)/(9 - x ^ 2)
11) 5 + 96/(x ^ 2 - 16) = (2x - 1)/(x + 4) + (3x - 1)/(x - 4)
12) (2x)/(2x - 1) + x/(2x + 1) = 1 + 4/((2x - 1)(2x + 1))
13) (x + 2)/(x - 2) - 1/x = 2/(x ^ 2 - 2x)
14) x/(2x - 6) + x/(2x + 2) = (2x + 4)/(x ^ 2 - 2x - 3)
1, \(\sqrt{x-1}+\sqrt{x-4}=5\)
2, \(2x-7\sqrt{x}+5=0\)
3, \(\sqrt{2x+1}+\sqrt{x-3}=2\sqrt{x}\)
4, \(x-4\sqrt{x}+2021\sqrt{x-4}+4=0\)
5, \(\sqrt{2x-3}-\sqrt{x+1}=7\left(4-x\right)\)
Giải pt
a1)1/3 căn x-2 -2/3 căn 9x-18 +6 căn x-2/81 =-4
a2)căn 9x+27 +4 căn x+3 -3/4 căn 16x+48 =0
a3)căn 1-x +căn 4-4x -1/3 căn 16-16x +5=0
a4)căn x-3=3-x
a5)căn x^2-1 -x^2+1=0
b1)căn x^2-2x+1 =x^2-1
b2)căn 4x^2-9 = 2 căn 2x+3
b3)3 căn x^2-1 +2 căn x+1=0
b4)căn x^2-4 +căn x^2+4x+4 =0
b5)căn 4x^2-20x+25 +4x^2=25
Giúp mình với
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
Phương trình bậc cao
1/ 2X^3 + X +3 = 0
2/X + 3 căn 3X^2 + 7X -căn 3 =0
3/ 2X^3 +7X^2 -28X +12 =0
4/ 6X^3 -X^2 +14X +5 =0
Giải phương trình
a) \(\sqrt{2x-5}=\sqrt{x+3}\)
b) \(\sqrt{2x^2-x+4}-2=x\)
c) \(\sqrt{1-x}=\sqrt{3x+2}\)
d) \(\sqrt{2x-3}=\sqrt{x-2}\)
e) \(\sqrt{x-2}-\sqrt{3+2x}=0\)
Mn giúp mình vs
1, \(x^3-6x^2+10x-4=0\)
2, \(x^3+2x^2+2\sqrt{2}x+2\sqrt{2}=0\)
3, \(x^4+x^2-\sqrt{2}x+2=0
\)
4, \(x^4+5x^3-12x^2+5x+1=0\)
5, \(\left(x+5\right)\left(2x+12\right)\left(2x+20\right)\left(x+12\right)=3x^2\)
6, \(\left(x^2-5x+1\right)\left(x^2-4\right)=6\left(x-1\right)^2\)
7, \(x^4-9x^3+16x^2+18x+4=0\)