5(8+3x)+2(3x-8)=0
=>40+15x+6x-16=0
=>21x=16-40
=>21x=-24
=>x=-24/21
Violympic toán 8
Các câu hỏi tương tự
1. (4x-10).(24+5x)=0
2 .(2x-5).(3x-2)=0
3. (2x-1).(3x+1)=0
4. x.(\(x\)2-1)=0
5.(5x+3).(\(x^2\)+4).(x-1)=0
6.(x-1).(x+2).(x+3)=0
7.(x-1).(x+5).(-3x+8)=0
1 tháng 12 2018 lúc 14:12
Tìm x biết:
1. (x-2)^2-(x-3)(x+3)=6
2. 4(x-3)^2-(2x-1)(2x+1)=10
3. (x-4)^2-(x-2)(x+2)=6
4.9(x+1)^2-(3x-2)(3x+2)=10
5. 3x +2(5-x)=0
6.x(2x-1)(x+5)-(2x^2+1)(x+4,5)=3,5
7, 3x^2-3x(x-2)=36
8. (3x^2-x+1)(x-1) +x^2(4-3x)=5/2
giải phương trình
a) \(\frac{4x-8}{2x^2+1}=0\)
b)\(\frac{x^2-x-6}{x-3}=0\)
c)\(\frac{x+5}{3x-6}-\frac{1}{2}=\frac{2x-3}{2x-4}\)
d)\(\frac{12}{1-9x^2}=\frac{1-3x}{1+3x}-\frac{1+3x}{1-3x}\)
(2x+3)(\(\frac{3x+8}{2-7x}\)+1)=(x-5)(\(\frac{3x+8}{2-7x}\)+1)
\(\dfrac{1}{x^2-3x}+\dfrac{1}{x^2+3x}+\dfrac{1}{x^2+9x+18}+\dfrac{3}{8}=0 \)
Giải phương trình :(4x+3)^3+(5-7x)^3+(3x-8)^3=0
1. 6x(x - 10) - 2x+200 6. 3x2 - 6x+30
2. 3x2(x - 3) + 3(3 - x)0 7. 4x2 - 10x+20
3. x2 - 8x+162(x -4) 8. x2 - 12x -180
4. x2 - 16 + 7x ( x+4)0 9. 3x2 - 10x+30
5. x2 - 13x - 140 10. 5x2 - 10x+100
Đọc tiếp
1. 6x(x - 10) - 2x+20=0 6. 3x2 - 6x+3=0
2. 3x2(x - 3) + 3(3 - x)=0 7. 4x2 - 10x+2=0
3. x2 - 8x+16=2(x -4) 8. x2 - 12x -18=0
4. x2 - 16 + 7x ( x+4)=0 9. 3x2 - 10x+3=0
5. x2 - 13x - 14=0 10. 5x2 - 10x+10=0
PHƯƠNG TRÌNH NGHIỆM NGUYÊN
Tìm các cặp số nguyên (x,y) biết:
a, 2x2+3x-2y=8
b. 2xy + 5x - y = 8
c. 4xy-4y2 - 3x + 5y=5
d, x2 + 2y2 - 2xy + 6x - 8y + 6 =0
(x2-3x+2)(x2+15x+56)+8=0
(2x2-3x+1)(2x2-5x+1)-9x2=0