1.
a.\(\Leftrightarrow7x-5x=3+12\)
\(\Leftrightarrow2x=15\Leftrightarrow x=\dfrac{15}{2}\)
b.\(\Leftrightarrow6x-10-7x-7=2\)
\(\Leftrightarrow x=-19\)
c.\(\Leftrightarrow1-3x=4x-3\)
\(\Leftrightarrow7x=2\Leftrightarrow x=\dfrac{2}{7}\)
d.\(\Leftrightarrow8x^2-4x+12x-6-8x^2-8x-2=12\)
\(\Leftrightarrow-2=12\left(voli\right)\)
Giai phường trình sau:
a, \(3x^2+2x-1=0\) e, \(4x^2-12x+5=0\) i,\(2x^2+5x-3=0\)
b,\(x^2-5x+6=0\) f, \(2x^2+5x+3=0\) j,\(x^2+6x-16=0\)
c,\(x^2-3x+2=0\) g,\(x^2+x-2=0\)
d,\(2x^2-6x+1=0\) h, \(x^2-4x+3=0\)
Giai phương trình sau:
a,\(x^2+3x-10=0\) b,\(3x^2-7x+1=0\)
c,\(3x^2-7x+8=0\) d,\(4x^2-12x+9=0\)
e,\(3x^2+7x+2=0\) h,\(x^2-4x+1=0\)
i,\(2x^2-6x+1=0\) j, \(3x^2+4x-4=0\)
Giải phương trình
1) 5(x - 3) - 4 = 2(x - 1)
2) 5(x - 3) - 2(x - 5) = x-2
3) 3(x - 2) - 14x = 2(3-) + 1
4) (x + 1)²+ 2x = x(x + 1) + 6
5) 3 - 4x(3 - 2x) = 8x² + x - 30
6) x²-x(5 - x) = 8
7) (x - 1)² - 36 = 0
8) (3x - 1)(4x - 3) + 2x(6x - 1) = 2(2x + 7)
9) (x - 2)² + 4(x - 3) =(x² + x - 3)
10) (x - 2)² – 2(x + 1) = (x - 1)(x - 2)
11) (x - 2)² + 3(x - 5) = x² + 3x - 3
12)(x - 3)² + (x + 3)² = 2 (x² +9)
13) (3x - 1)2 + (3x +1)² = 2(9x² + 4) + 1
14) (x - 1)(x - 2) + (2x + 1) = 5x²
Giải phương trình: a/ (x^2+1)(x-1)=0
b/x^3+1=x(x+1)
c/ 7-(2x+4)=-(x+4)
d/ (x-1)-(2x-1)=9-x
e/ x(x+3)^2-3x=(x+2)^3+1
f/ (x-3)(x+4)-2(4x-2)=(x-4)^2
a)\(x^4+\left(x-1\right)\left(3^{x^2}+2x-2\right)=0\)
b)\(\dfrac{x^2-3x+5}{x^2-4x+5}-\dfrac{x^2-5x+5}{x^2-6x+5}=\dfrac{-1}{4}\)
Tìm giá trị lớn nhất của biểu thức:
A= -2x2 +5x-8
B= -x2-y2 + xy+2x+2y
C= \(\frac{3}{4x^2-4x+5}\)
D=\(\frac{x^2-6x+14}{x^2-6x+12}\)
giải phương trình, tiếp
\(\left(x+1\right)^2=4\left(x^2-2x+1\right)^2\)
\(\left(2x+7\right)^2=9\left(x+2\right)^2\)
\(4\left(2x+7\right)^2=9\left(x+3\right)^2\)
\(\frac{1}{9}\left(x-3\right)^2-\frac{1}{25}\left(x+5\right)^2=0\)
\(2x^2-6x+1=0\)
\(3x^2+12x-66=0\)
\(9x^2-30x+225=0\)
\(3x^2-7x+1=0\)
\(3x^2-7x+8=0\)
\(x^2-4x+1=0\)
\(2x^2-6x+1=0\)
a, \(\dfrac{x+2}{2x-4}-\dfrac{4x}{x^2-4}=0\)
b, \(\dfrac{x}{x-1}-\dfrac{5x-3}{x^2-1}=0\)
Giair phương trình sau:
a,\(2x^3+5x^2-3x=0\) b,\(2x^3+6x^2=x^2+3x\)
c,\(x^2+\left(x+2\right)\left(11x-7\right)=4\) d,\(\left(x-1\right)\left(x^2+5x-2\right)-\left(x^3-1\right)=0\)
e, \(x^3+1=x\left(x+1\right)\) f,\(x^3+x^2+x+1=0\)
g,\(x^3-3x^2+3x-1=0\) h,\(x^3-7x+6=0\)
i,\(x^6-x^2=0\) j,\(x^3-12=13x\)
k,\(-x^5+4x^4=-12x^3\) l, \(x^3=4x\)
