\(\frac{2x}{3x^2-x+2}-\frac{7x}{3x^2+5x+2}=1\)
\(\frac{2x}{3x^2-x+2}-\frac{7x}{3x^2+3x+2x+2}=1\)
\(\frac{2x}{3x^2-x+2}-\frac{7x}{3x\left(x+1\right)+2\left(x+1\right)}=1\)
\(\frac{2x}{3x^2-x+2}-\frac{7x}{\left(3x+2\right)\left(x+1\right)}=1\)
\(-15x^3+17x^2-10x=9x^4+12x^3+7x^2+8x+4\)
\(-15x^3+17x^2-10x-9x^4-12x^3-7x^2-8x-4=0\)
\(-27x^3+10x^2-18x-9x^4-4=0\)
=> pt vô nghiệm
giải phương trình
a)\(\frac{7x+10}{x+1}\left(x^2-x-2\right)=\frac{7x+10}{x+1}\left(2x^2-3x-5\right)\)
b)\(\frac{1}{x^2-5x+6}+\frac{1}{x^2-7x+12}+\frac{1}{x^2-9x+20}+\frac{1}{x^2-11x+30}=\frac{1}{8}\)
c)\(x^2+\frac{1}{x^2}+\frac{9x}{2}-\frac{9}{2x}+7=0\)
Bài 1: Thực hiện phép tính
a. \(\frac{11x+10}{3x-3}+\frac{15x+13}{4-4x}\)
b. \(\frac{5x+3}{x^2-3x}+\frac{9-x}{9-3x}\)
c. \(\frac{4xy-1}{5x^2y}-\frac{2xy-1}{5x^2y}\)
d. \(\frac{x+8}{x^2-16}-\frac{2}{x^2+4x}\)
e. \(\frac{x^2-49}{2x+1}.\frac{3}{7-x}\)
f. \(\frac{3x^2-2x}{x^2-1}.\frac{1-x^4}{\left(2-3x\right)^3}\)
g. \(\frac{5xy}{2x-3}:\frac{15xy^3}{12-8x}\)
h. \(\frac{x^2+2x}{3x^2-6x+3}:\frac{2x+4}{5x-5}\)
5x^2(3y-1)-[3x^2(5y+2)-2x(3x^2-7x)]
\(\frac{x-3}{x-2}-\frac{x-2}{x-4}=3\frac{1}{5}\)
3x2-7x+1=0
2x2-6x+1=0
mọi người giúp em với
Rút gọn:
c.)(7x-8)(7x+8)-10(2x+3)2+5x(3x-2)2-4x(x-5)2.
d.) (x2-3)(x2+3)-5x2(x+1)2-(x2-3x)(x2-2x+4x)(x+2)2
1) Tìm số a để
a) đa thức 3x^3 + 2x^2 - 7x + a chia hết cho 3x - 1
b)_______ 2x^2 +ax - 4 __________ x+4
c)_______ x^3 + ax^2 + 5x + 3 ___________ x^2 + 2x + 3
\(\frac{3x}{5x+5y}-\frac{x}{10x-10y}\\ \left(\frac{3x}{1-3n}+\frac{2n}{3x+1}\right):\left(\frac{6x^2+10x}{1-6x+9x^2}\right)\\ \left(\frac{9}{x^3-9n}+\frac{1}{x+3}\right):\left(\frac{x}{3n+9}\right)\)
1. \(\frac{1}{2}x^2-\left(\frac{1}{2}x-4\right)\frac{1}{2}x=-14\)
2. \(3\left(1-4x\right)\left(x-1\right)+4\left(3x-2\right)\left(x+3\right)=-27\)
3. \(6x\left(5x+3\right)+3x\left(1-10x\right)=7\)
4. \(\left(3x-3\right)\left(5-21x\right)+\left(7x+4\right)\left(9x-5\right)=44\)
5. \(\left(-2+x^3\right)\left(-2+x^2\right)\left(-2+x^2\right)=1\)
Bài 1: a) (x^2 - 5x) . (x^2 - x + 3) - ( x^3 - x^2 + 1)
b) (2x^3 - 5x^2 + 6x - 15) : (3x-5)
c) (x^3 - 3x^2) : (x-3)
d) (x^3 - x^2 -10) : ( x - 2)
e) ( 2x ^4 - 5x^2 + 4^3 - 3 - 3x) : ( x^2 - 3)
Bài 2: Tìm x :
a) (3x^3 + 10x^2 -5 +x) : ( 3x +1)
b) (10x^2 -7x + x) : ( 2x -3)
Các bạn cố gắng làm nhanh giúp mk nha 😭 Ai nhanh nhất mk tick cho 😝
Thannks trước 😘
