\(3x^{2}+7x-10=0\)
\(⇔3x^2-3x+10x-10=0\)
\(⇔3x(x-1)+10(x-1)=0\)
\(⇔(x-1)(3x+10)=0\)
\(⇔\left[\begin{array}{} x-1=0\\ 3x+10=0 \end{array}\right.\)
\(⇔\left[\begin{array}{} x=1\\ x=-\dfrac{10}{3} \end{array}\right.\)
Vậy pt có tập nghiệm là S={\({1; -\dfrac{10}{3}}\)}
(3x^2+7x-10)/x=0
Giair phương trình:
\(\dfrac{3x}{x-2}-\dfrac{x}{x+5}+\dfrac{2x^2}{7x-10-x^2}=0\)
Giair phương trình
1) 2x2-3x-2=0 7) (2x2-3x-4)2=(x2-x)2
2) 4x2-7x-2=0 8) \(\dfrac{2}{x+1}-\dfrac{3}{x+2}=\dfrac{1}{3x+3}\)
3) 4x2+5x-6=0 9) \(\dfrac{x}{x-3}=\dfrac{1}{x+2}\)
4) 4x2+5x-9=0 10) \(\dfrac{4}{2x-3}-\dfrac{7}{3x-5}=0\)
5) 5x2-18x-8=0 11) \(\dfrac{7}{x+2}+\dfrac{2}{x+3}=\dfrac{1}{x^2+5x+6}\)
6) (3x2+2x+4)2=(x2-4)2 12) \(\dfrac{4}{x-2}+\dfrac{x}{x+1}=\dfrac{x^2-2}{x^2-x-2}\)
Giúp em vs em đag cần câu tl gấp
em c.ơn trước
1, 7x - 4 = 3x + 20
2, 2x - 5^2 - x + 2^2 = 0
3, 2/x+1 + 1 = 7/x+1 
giai pt (giup toi voi)
1.\(\dfrac{4x}{4x^2-8x+7}+\dfrac{3x}{4x^2-10x+7}=1\)
2.\(\dfrac{2x}{x^2+3x-10}\)+\(\dfrac{5x}{x^2+7x-10}=4\)
Giải phương trình:
\(\dfrac{2x}{3x^2-x+2}\) - \(\dfrac{7x}{3x^2+5x+2}\) = 1
help
a, 3x2+7x-10/x=0
