Tim x: 3(x-1)^2 - 3x(x-5) = 1 ; x^2 - 2x + 1 Mn giup e vs ak
Những câu hỏi liên quan
tim x:
(x-1)(x+2)-x^2+3=5
(x-2)(3x+4)=3x(x-2)
5(x-3)+(x-2)(5x-1)=5x^2
Tuyet Anh Nguyen
1.a)(3x-2)(4x+5)=0
12x^2+7x-10=0>>x1=2/3,x2=-5/4
b)4x^3+2x^2+4x+2=0>>x=-1
c)0,23x^2-4,21x-13,8=0>>x1=21,14,x2=-2,8...
d)10x^3-13x^2-178x-35=0>>x1=5,x2=-1/5
b2/a)2x^3+5x^2-3x=0>>x1=1/2,x2=-3
b)(3x-1)(x^2-7x+12)=0>>x1=1/3,x2=4,x3=...
b3/
a)x^2+x-2=0>>x1=1,x2=-2
b)x1=-1,x2=-6
b4/a)0,5x^2-1,5x-1,5x^2+x+4,5x-3=0>>-x...
b)3x/7-1=3x/7-x>>x=1
c)2x^2-13x+15=0>>x1=5,x2=3/2
P/s: Tham khảo nha
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bai1.tim x biet:
a,(x+2).(x+3)-(x-2).(x+5)=0
b,(2x+3).(x-4)+(x-5).(x-2)=(3x-5).(x-4)
c,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)=33
,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)-33 đúng không bạn
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Xem thêm câu trả lời
Tim x: (2x-1)2-(x+1)(2-3x)=(3+x)2-3(x-5)
mk làm lun nha
(4x^2-4x+1)-(2x-3x^2+2-3x)=(9+6x+x^2)-3x+15
4x^2-4x+1-2x+3x^2-2+3x=9+6x+x^2-3x+15
CHUYỂN VẾ,TA ĐƯỢC:
6x^2=25
x^2=25/6
X=5/căn 6
**** CHO MK NHA
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tim gia tri cua bien thoa man mot dieu kien cho truoc
1) (x-2)^3-(x-3)*(x^2+3x+9)+6(x+1)^2=49
2) x(x+5)(x-5)-(x+2)(x^2-2x+4)=42
3) (x+3)^3-(x+1)^3=56
4) (3x-5)(5-3x)+9(x+1)^2=30
5) x(x+5)(x-5)-(x+2)(x^2-2x+4)=42
HO MIK VS A CAM ON MN
tim số nguyên x biết
5/6 = x -1/x
1/2 = x +1/3x
2x -1/3=3x +1/4
4/3=2x-1/x
Tim x: x^2 - 2x + 1 = 25 ; 3(x-1)^2 - 3x(x-5)=1
Mn giup e vs <3
\(x^2-2x+1=25\)
\(\Leftrightarrow\)\(\left(x+1\right)^2=25\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x+1=5\\x+1=-5\end{cases}}\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x=4\\x=-6\end{cases}}\)
Vậy...
\(3\left(x-1\right)^2-3x\left(x-5\right)=1\)
\(\Leftrightarrow\)\(3\left(x^2-2x+1\right)-\left(3x^2-15x\right)=1\)
\(\Leftrightarrow\)\(3x^2-6x+3-3x^2+15x=1\)
\(\Leftrightarrow\)\(9x=-2\)
\(\Leftrightarrow\)\(x=-\frac{2}{9}\)
Vậy....
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xin lỗi nhé, câu a mình làm sai:
a) \(x^2-2x+1=25\)
\(\Leftrightarrow\)\(\left(x-1\right)^2=25\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x-1=5\\x-1=-5\end{cases}}\)
\(\Leftrightarrow\)\(\orbr{\begin{cases}x=6\\x=-4\end{cases}}\)
Vậy....
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Tim x: 3(x-1)^2 - 3x(x-5)=1 mn giup e voi a <3
\(3\left(x-1\right)^2-3x\left(x-5\right)=1\)
\(\Rightarrow3x^2-3^2-3x^2+15x=1\)
\(\Rightarrow3x^2-9-3x^2+15x=1\)
\(\Rightarrow-9+15x=1\)
\(\Rightarrow15x=-8\)
\(\Rightarrow x=\frac{-8}{15}\)
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Tim x biet
(X+1)×(x+2)<0 x-2/3x+2 <0
(-3+3/x -1/3) ÷ (1+2/3+2/5)=-5/4
tim x a,1/3x-4/3=5 b,2/3x+1/2=2 c,3-3/4x=x-5
a/ => 1/3x = 5+4/3 = 19/3
=> x = 19/3 : 1/3 = 19
b/ 2/3x = 2-1/2 = 3/2
x = 3/2 : 2/3=9/4
c/ 3+5 = x+3/4x
8 = 7/4x
x = 8:7/4
x = 32/7
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