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(x - 4)2 = (x - 4)4
<=> (x - 4)2 - (x - 4)4 = 0
<=> (x - 4)2 [ 1 - (x - 4)2 ] = 0
<=> \(\orbr{\begin{cases}\left(x-4\right)^2=0\\1-\left(x-4\right)^2=0\end{cases}\Leftrightarrow}\orbr{\begin{cases}x-4=0\\\left(x-4\right)^2=1\end{cases}\Leftrightarrow\orbr{\begin{cases}x-4=0\\\left(x-4\right)^2=1\end{cases}}}\)
Giải (x - 4)2 = 1
TH1: x - 4 = -1
<=> x = 3
TH2: x - 4 = 1
<=> x = 5
4.(x - 2) + 3.(x - 1) = 2.x + 4
=> (4x - 8) + (3x - 3) =2x + 4
=> 4x - 8 + 3x - 3 = 2x + 4
=> 7x - 11 = 2x + 4
=> 7x - 2x = 4 + 11
=> 5x = 15
=> x = 15 : 5
=> x = 3
4.(x-2)+3.(x-1)=2.x+4
<=>4x-8+3x-1=2x+4
<=>4x+3x-2x=4+8+1
<=>5x=13
<=>x=\(\frac{13}{5}\)
vậy x=\(\frac{13}{5}\)
ủng hộ nha
\(-4+x=-4+7\)
\(\Rightarrow x=-4+7+4\)
\(\Rightarrow x=7\)
\(\left(-3\right)-\left(-5-x\right)=-15+\left(-6+15\right)\)
\(\Rightarrow x=-15-6+15+3-5\)
\(\Rightarrow x=-8\)
\(-\left(x+2\right)+2=\left(8-15\right)+15\)
\(\Rightarrow-x+2+2=-7+15\)
\(\Rightarrow-x=-7+15-2-2\)
\(\Rightarrow x=-4\)
\(4+\left(x-4\right)=-\left(11-2\right)+\left(11+4\right)\)
\(\Rightarrow4+x-4=-11+2+11+4\)
\(\Rightarrow x=-11+2+11+4-4+4\)
\(\Rightarrow x=6\)
a) -4 + x = -4 + 7 b) (-3) - (-5-x) = -15 + (-6+15)
-4 + x + 4 - 7 = 0 (-3) + 5 + x = -6
x - 7 = 0 2 + 6 = -x
x= 7 8 = -x
Vậy x= 7 x= -8 =) Vậy x= -8
c) -(x+2)+2=(8-15)+15 d) 4+(x-4)= -(11-2) + (11+4 )
-x - 2 + 2 = 8 4+x-4 = 6
-x = 8 x=6
x= -8 Vậy x=6
Vậy x= -8
\(\left(x-4\right)^2=\left(x-4\right)^4\)
\(\Rightarrow\left(x-4\right)^2-\left(x-4\right)^4=0\)
\(\Rightarrow\left(x-4\right)^2-\left(x-4\right)^2.\left(x-4\right)^2=0\)
\(\Rightarrow\left(x-4\right)^2.\left[1-\left(x-4\right)^2\right]=0\)
TH 1 : \(\left(x-4\right)^2=0\Rightarrow x-4=0\Rightarrow x=4\)
TH 2 : \(1-\left(x-4\right)^2=0\Rightarrow\left(x-4\right)^2=1\Rightarrow\orbr{\begin{cases}x-4=1\\x-4=-1\end{cases}}\Rightarrow\orbr{\begin{cases}x=5\\x=3\end{cases}}\)
Vậy x = 3; x = 4 hoặc x = 5
x = 4 nha