Bài 1: Mở đầu về phương trình
Các câu hỏi tương tự
Giải phương trình:
1) (3x-1)^2-5(2x+1)^2+96x-3)(2x+1)(x-1)^2
2) (x+2)^3-(x-2)^312(x-1)-8
3) x-1/4-5-2x/93x-2/3
4) 25x-655/95-5(x-12)/209[89-3x-2(x-13)/5]/11
5) 29-x/21+27-x/23+25-x/25+23-x/27-4
6) x-69/30+x-67/32x-63/36+x-61/38
7)x+117/19+x+4/28+x+3/570
8) 59-x/41+57-x/43+2x-55?45+x-53/47-2
9) Cho phương trình: mx+x-m^22x-2 (x là ẩn). Tìm m để phương trình:
a) Có nghiệm duy nhất
b) Vô số nghiệm
c) Vô nghiệm
Đọc tiếp
Giải phương trình:
1) (3x-1)^2-5(2x+1)^2+96x-3)(2x+1)=(x-1)^2
2) (x+2)^3-(x-2)^3=12(x-1)-8
3) x-1/4-5-2x/9=3x-2/3
4) 25x-655/95-5(x-12)/209=[89-3x-2(x-13)/5]/11
5) 29-x/21+27-x/23+25-x/25+23-x/27=-4
6) x-69/30+x-67/32=x-63/36+x-61/38
7)x+117/19+x+4/28+x+3/57=0
8) 59-x/41+57-x/43+2=x-55?45+x-53/47-2
9) Cho phương trình: mx+x-m^2=2x-2 (x là ẩn). Tìm m để phương trình:
a) Có nghiệm duy nhất
b) Vô số nghiệm
c) Vô nghiệm
giả phương trình
dfrac{x+1}{2}+dfrac{3x-2}{3}dfrac{x-7}{12}
b) dfrac{2x}{x-3}-dfrac{5}{x+3}dfrac{x^2+21}{x^2-9}
c) x3+2x 0
d) ( x-4) (7x-3) -x2+160
e) 2x-42
g) (x+2)(x-3) 0
h) dfrac{2}{x+1}-dfrac{1}{x-2}dfrac{3x-11}{left(x+1right).left(x-2right)}
dfrac{ }{ }
i) dfrac{1}{x+2}+dfrac{5}{x-2}dfrac{2x-12}{x^2-4}
Đọc tiếp
giả phương trình
\(\dfrac{x+1}{2}+\dfrac{3x-2}{3}=\dfrac{x-7}{12}\)
b) \(\dfrac{2x}{x-3}-\dfrac{5}{x+3}=\dfrac{x^2+21}{x^2-9}\)
c) x3+2x = 0
d) ( x-4) (7x-3) -x2+16=0
e) 2x-4=2
g) (x+2)(x-3) = 0
h) \(\dfrac{2}{x+1}-\dfrac{1}{x-2}=\dfrac{3x-11}{\left(x+1\right).\left(x-2\right)}
\dfrac{ }{ }\)
i) \(\dfrac{1}{x+2}+\dfrac{5}{x-2}=\dfrac{2x-12}{x^2-4}\)
4 * ( x + 10 ) +5 = 2 * ( 3x + 10 - 2
5 * (x-2) -3 = 2* (x-1)+9
5x*(x-3)-2*(3-x)=0
2x*(3x-3)+4=3x(2x+1)-1
(x-4)(x+1)-x2 +1=0
(3x-2)2 - (x+5)2 =0
4*(x+1)=3+2x
1) (x + 1)² + 2x = x(x + 1) + 6
2) 3 - 4x(3 - 2x) = 8x² + x - 30
3) x²-x(5 - x) = 8
4) (x - 1)² - 36 = 0
5) (3x - 1)(4x - 3) + 2x(6x - 1) = 2(2x + 7)
giải giúp hết với
câu 1. giải phương trình
a) 4.(x+5).(x+6).(x+10).(x+12) 3x^2
b) (x+1).(x+2).(x+3).(x+6) 120x^2
c) (x+2).(x+3).(x+8).(x+12) 4x^2
d) (x-4).(x-5).(x-8).(x-10) 72x^2
e) (x+1).(x+3).(x+5).(x+15) -16x^2
f) (2x^2 - 3x + 1).(2x^2 + 5x + 1) 9x^2
Đọc tiếp
giải giúp hết với
câu 1. giải phương trình
a) 4.(x+5).(x+6).(x+10).(x+12) = \(3x^2\)
b) (x+1).(x+2).(x+3).(x+6) = \(120x^2\)
c) (x+2).(x+3).(x+8).(x+12) = \(4x^2\)
d) (x-4).(x-5).(x-8).(x-10) = \(72x^2\)
e) (x+1).(x+3).(x+5).(x+15) = \(-16x^2\)
f) (\(2x^2\) - 3x + 1).(\(2x^2\) + 5x + 1) = \(9x^2\)
a) 5(k+3x)(x+1)-4(1+2x)80 x_02Tìm gt của kb) x+1xc) x+20d) x+50e) (x+1)(2x-3)-3(x-2)2(x-1)^2f) (x+1)(x^2-x+1)-2xx(x-1)(x+1)g)dfrac{x}{3}-dfrac{5x}{6}-dfrac{15x}{12}dfrac{x}{4}-5h) dfrac{x-1}{2}-dfrac{x+1}{15}-dfrac{2x-13}{6}0i) dfrac{3left(5x-2right)}{4}-2dfrac{7x}{3}-5(x-7)j) dfrac{x-3}{11}+dfrac{x+1}{3}dfrac{x+7}{9}-1k)dfrac{3x-0,4}{2}+dfrac{1,5-2x}{3}dfrac{x+0,5}{5}l) dfrac{x-4}{5}+dfrac{3x-2}{10}-xdfrac{2x-5}{3}-dfrac{7x+2}{6}m) dfrac{left(2x-3right)left(2x+3right)}{8}dfrac{left(x-4right)...
Đọc tiếp
a) 5(k+3x)(x+1)-4(1+2x)=80 x\(_0\)=2Tìm gt của kb) x+1=xc) x+2=0d) x+5=0e) (x+1)(2x-3)-3(x-2)=2(x-1)\(^2\)f) (x+1)(x\(^2\)-x+1)-2x=x(x-1)(x+1)g)\(\dfrac{x}{3}\)-\(\dfrac{5x}{6}\)-\(\dfrac{15x}{12}\)=\(\dfrac{x}{4}\)-5h) \(\dfrac{x-1}{2}\)-\(\dfrac{x+1}{15}\)-\(\dfrac{2x-13}{6}\)=0i) \(\dfrac{3\left(5x-2\right)}{4}\)-2=\(\dfrac{7x}{3}\)-5(x-7)
j) \(\dfrac{x-3}{11}\)+\(\dfrac{x+1}{3}\)=\(\dfrac{x+7}{9}\)-1k)\(\dfrac{3x-0,4}{2}\)+\(\dfrac{1,5-2x}{3}\)=\(\dfrac{x+0,5}{5}\)l) \(\dfrac{x-4}{5}\)+\(\dfrac{3x-2}{10}\)-x=\(\dfrac{2x-5}{3}\)-\(\dfrac{7x+2}{6}\)m) \(\dfrac{\left(2x-3\right)\left(2x+3\right)}{8}\)=\(\dfrac{\left(x-4\right)^{^2}}{6}\)+\(\dfrac{\left(x-2^{ }\right)^2}{3}\)n) \(\dfrac{7x^2-14x-5}{15}\)=\(\dfrac{\left(2x+1\right)^2}{5}\)-\(\dfrac{\left(x-1\right)^2}{3}\)o) \(\dfrac{\left(7x+1\right)\left(x-2\right)}{10}\)+\(\dfrac{2}{5}\)=\(\dfrac{\left(x-2^{ }\right)^2}{5}\)+\(\dfrac{\left(x-1\right)\left(x-2\right)}{10}\)
Hai phương trình sau có tương đương không ?
a) \(x^2-2x-3=0\) và (x+1) (x+3) = 0
b) \(2x^2-3x+1=0\) và \(x^9+7x^5+9x^2-6=0\)
1) (x - 2)² + 4(x - 3) =(x² + x - 3)
2) (x - 2)² – 2(x + 1) = (x - 1)(x - 2)
3) (x - 2)² + 3(x - 5) = x² + 3x - 3
4)(x - 3)² + (x + 3)² = 2 (x² +9)
5) (3x - 1)² + (3x +1)² = 2(9x² + 4) + 1
6) (x - 1)(x - 2) + (2x + 1)² = 5x²
1) (x - 2)² + 4(x - 3) =(x² + x - 3)
2) (x - 2)² – 2(x + 1) = (x - 1)(x - 2)
3) (x - 2)² + 3(x - 5) = x² + 3x - 3
4)(x - 3)² + (x + 3)² = 2 (x² +9)
5) (3x - 1)² + (3x +1)² = 2(9x² + 4) + 1
6) (x - 1)(x - 2) + (2x + 1)² = 5x²