VT=-4(14x-39)
VP=12(2x-27)
pt trở thành -4(14x-39)=12(2x-27)
=>156-56x=24x-324
=>-80x=-480
=>x=6
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Tìm x, biết:
\(4\left(18-5x\right)-12\left(3x-7\right)=15\left(2x-16\right)-6\left(x+14\right)\)
Tìm x
\(2x.\left(x-5\right)-x.\left(3+2x\right)=26\)
\(\left(x-7\right).\left(x-5\right)-12.\left(3x-7\right)=15\)
\(4.\left(18-5x\right)-12.\left(3x-7\right)=15.\left(2x-16\right)-6.\left(x+14\right)\)
\(\left(x-1\right).\left(x^2+x+1\right)=x^3-2x\)
1)Tim x, biet : a) \(4\left(18-5x\right)-12\left(3x-7\right)=15\left(2x-16\right)-6\left(x+14\right)\)
b) \(2\left(5x-8\right)-3\left(4x-5\right)=4\left(3x-4\right)+11\)
NV
2 tháng 2 2023 lúc 19:50
Giải các phương trình:
a) \(\left|2x\right|=x-6\)
b) \(\left|-3x\right|=x-8\)
c) \(\left|4x\right|=2x+12\)
d)\(\left|-5x\right|-16=3x\)
BÀI 6 tìm x1,2xleft(x-5right)-left(3x+2x^2right)0 2,xleft(5-2xright)+2xleft(x-1right)133,2x^3left(2x-3right)-x^2left(4x^2-6x+2right)0 4,5xleft(x-1right)-left(x+2right)left(5x-7right)65,6x^2-left(2x-3right)left(3x+2right)1 6,2xleft(1-xright)+59-2x^2
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BÀI 6 tìm x
1,\(2x\left(x-5\right)-\left(3x+2x^2\right)=0\) 2,\(x\left(5-2x\right)+2x\left(x-1\right)=13\)
3,\(2x^3\left(2x-3\right)-x^2\left(4x^2-6x+2\right)=0\) 4,\(5x\left(x-1\right)-\left(x+2\right)\left(5x-7\right)=6\)
5,\(6x^2-\left(2x-3\right)\left(3x+2\right)=1\) 6,\(2x\left(1-x\right)+5=9-2x^2\)
Tìm x:8) 1-left(x-6right)4left(2-2xright)9)left(3x-2right)left(x+5right)010)left(x+3right)left(x^2+2right)011)left(5x-1right)left(x^2-9right)012)xleft(x-3right)+3left(x-3right)013)xleft(x-5right)-4x+20014)x^2+4x-50
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Tìm \(x\):
\(8\)) \(1-\left(x-6\right)=4\left(2-2x\right)\)
\(9\))\(\left(3x-2\right)\left(x+5\right)=0\)
\(10\))\(\left(x+3\right)\left(x^2+2\right)=0\)
\(11\))\(\left(5x-1\right)\left(x^2-9\right)=0\)
\(12\))\(x\left(x-3\right)+3\left(x-3\right)=0\)
\(13\))\(x\left(x-5\right)-4x+20=0\)
\(14\))\(x^2+4x-5=0\)
giải các pt
\(a,\frac{2x-13}{2x-16}+\frac{2\left(x-6\right)}{x-8}=\frac{7}{8}+\frac{2\left(5x-39\right)}{3x-24}\)
\(b,x\left(x-2\right)\left(x-1\right)\left(x+1\right)=24\)
\(c,x^4+2x^3+5x^2+4x-12=0\)
Tìm x biết :(đề không sai )1.-4xleft(x-7right)+4xleft(x^2-5right) 28x^2-132.left(4x^2-5xright)left(3x+2right)-7xleft(x+5right) left(-4+xright)left(-2x+3right)+12x^3+2x^2 3.left(-4x^2-3right)left(2x+5right) -left(8x-3right)left(-x^2+2right) -5xleft(x-6right)-3x^2-4 4.left(x-7right)left(x+5right)-left(x-3right)left(x-2right) 15x^2left(x+1right)-left(3x^2-1right) left(5x^2-2right)-21x^25.left(x-3right)left(-x+10right)+left(x-8right)left(x+3right)left(5x^2-1right)left(x+3right)-5x^3-15x^26.left(...
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Tìm x biết :(đề không sai )
1.\(-4x\left(x-7\right)+4x\left(x^2-5\right)\) \(=28x^2-13\)
2.\(\left(4x^2-5x\right)\left(3x+2\right)-7x\left(x+5\right)\) \(=\left(-4+x\right)\left(-2x+3\right)+12x^3+2x^2\)
3.\(\left(-4x^2-3\right)\left(2x+5\right)\) \(-\left(8x-3\right)\left(-x^2+2\right)\) \(-5x\left(x-6\right)-3x^2-4\)
4.\(\left(x-7\right)\left(x+5\right)-\left(x-3\right)\left(x-2\right)\) \(=15x^2\left(x+1\right)-\left(3x^2-1\right)\) \(\left(5x^2-2\right)-21x^2\)
5.\(\left(x-3\right)\left(-x+10\right)+\left(x-8\right)\left(x+3\right)\)\(=\left(5x^2-1\right)\left(x+3\right)-5x^3-15x^2\)
6.\(\left(-2x^2+5\right)\left(-x+3\right)-x^2\left(2x-6\right)\) \(=\left(x-1\right)\left(x+1\right)-\left(x-2\right)\left(x+4\right)\)
Chứng minh biểu thức sau không phụ thuộc vào giá trị của biến:A^{x^2}-4x-xleft(x-4right)-15B5xleft(x^2-xright)-x^2left(5x-5right)-13C-3xleft(x-5right)+3left(x^2-4xright)-3x+7D7left(x^2-5x+3right)-xleft(7x-35right)-14E4xleft(x^2-7+2right)-4left(x^3-7x+2x-5right)Hxleft(5x-3right)-x^2left(x-1right)+xleft(x^2-6xright)-10+3x
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Chứng minh biểu thức sau không phụ thuộc vào giá trị của biến:
A=\(^{x^2}-4x-x\left(x-4\right)-15\)
B=\(5x\left(x^2-x\right)-x^2\left(5x-5\right)-13\)
C=\(-3x\left(x-5\right)+3\left(x^2-4x\right)-3x+7\)
D=\(7\left(x^2-5x+3\right)-x\left(7x-35\right)-14\)
E=\(4x\left(x^2-7+2\right)-4\left(x^3-7x+2x-5\right)\)
H=\(x\left(5x-3\right)-x^2\left(x-1\right)+x\left(x^2-6x\right)-10+3x\)