Ta có: \(\left(5x+3\right)\left(x^2+4\right)\left(x-1\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}5x+3=0\\x^2+4=0\\x-1=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}5x=-3\\x^2=-4\\x=1\end{matrix}\right.\) (loại) \(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{-3}{5}\\x=1\end{matrix}\right.\)
\(\Rightarrow S=\left\{\dfrac{-3}{5};1\right\}\)
1) (1-x)(5x+3)=(3x-7)(x-1)
2) (x-2)(x+1)=x2-4
3) 2x3+3x2-32x=48
4) x2+2x-15=0
5) 2x(2x-3)=(3-2x)(2-5x)
6) x3-5x2+6x=0
7) (x2-5)(x+3)=0
8) (x+7)(3x-1)=49-x2
(x2 - 4 ).( 2 - 4x ) = 0
x2 - 5x + 6 = 0
Câu 1 : a,6(x-1)-4= 2(x+2)
b,x(x+2)=x(x+3)
Câu 2:(x+1)(x-2)=0
(X+2)(2x-4)=0
X²-5x=4x-20
Giải bất phương trình
a) x3 - 6x2 + 5x + 12 >0
b) \(\frac{5x\left(2x+1\right)\left(5-x\right)}{\left(x+3\right)\left(3x-4\right)}>0\)
c) \(\frac{1}{2-3}>\frac{2}{1+4x}\)
d) \(\frac{1}{x}+\frac{2}{x+2}< \frac{3}{x+1}\)
e) 3x3 - 14x2 + 20x >8
f) x5 - x4 + x3 - x2 + x - 1<0
g) (x - 1)(x - 3)(x + 5)(x + 7)<297
h) x4 - 2x3 + x >132
Câu 1: Giải phương trình
a) 2x + 6 = 0
b) 4x + 20 = 0
c) 2(x - 1) = 5x - 7
d) 2x - 3 = 0
e) 3x - 1 = x + 3
f) 15 - 7x = 9 - 3x
g) x - 3 = 18
h) 2x + 1 = 15 - 5x
1 Giải các bất PT sau
a) (2x+1)2-(x+2)2>0
b)\(\dfrac{5x^2-3x}{5}+\dfrac{3x+1}{4}< \dfrac{x\left(2x+1\right)}{2}-\dfrac{3}{2}\)
c) \(\dfrac{-1}{2x+3}< 0\)
Giải bpt sau
a, \(\left(x+3\right)^2-\left(x-3\right)^2\le3\left(x+1
\right)\)
b, \(2\left(x+3\right).\left(x+4\right)>\left(x-2\right)^2+\left(x-1\right)^2\)
c, \(5x^2-18x+19-\left(2x-3\right)^2>0\)
d, \(\dfrac{\left(3x-2\right)^2}{4}-\dfrac{3\left(x-2\right)}{8}-1>\dfrac{-15x\left(5-3x\right)}{2}\)
e, \(2x^2+2x+2-\dfrac{15\left(x-1\right)}{2}-1>2x\left(x-2,75\right)\)
g, \(\dfrac{5x^2-3}{5}+\dfrac{3x-1}{4}< \dfrac{x\left(2x+3\right)}{2}-5\)
Giải phương trình sau
(x-3/x+3)-(2/x-3)=-3x+1/x2-9
(1-x/x2 -4) +1=x+3/x-2
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(x+1)2=4 (×2-2x+1) (x-3)2+2 (x-1)<= x2 +3 |
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2x3+5x2-3x=0 |2x|=3x-2 |
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(x+1)(2x-2)-3>-5x-(2x+1)(3-x) (x+3/6)+(x-2/10)>x+1/5 |
mik đánh dấu ()để dễ phân biệt dc phép chia
Giải bất phương trình sau và biểu diễn tập nghiệm trên trục số:
a) -7x + 3(x -1) > 8 - x
b) 3(2 - x) + x ≥ 2
c) 5x + 3(4 - x) ≤ 4
d) 2(x - 5) - 5x ≤ 2
