Question

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Answer 1

a: =>2x-3-3x+1=34

=>-x-2=34

=>-x=36

hay x=-36

b: =>x+1=0 hoặc 5-5x=0

=>x=-1 hoặc x=1

c: \(\Leftrightarrow\left(2x+1\right)^3=45+19=64\)

=>2x+1=4

=>2x=3

hay x=3/2

d: \(\Leftrightarrow4x^2=16\)

=>x=2 hoặc x=-2

Answer 2

a) \(\left(2x-3\right)+\left(-3x+1\right)=34\)

\(2x-3-3x+1=34\)

\(-x=36\)

\(x=-36\)

b) \(\left(x+1\right)\left(5-5x\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=-1\\x=1\end{matrix}\right.\)

c) \(\left(2x+1\right)^3=49-\left(-19\right)=64=4^3\)

\(2x+1=4\)

\(x=\dfrac{3}{2}\)

d) \(4x^2-3=13\)

\(4x^2=16\)

\(x^2=4\)

\(\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-2\end{matrix}\right.\)

Answer 3

a) \(\left(2x-3\right)\left(-3x+1\right)=34\)

\(\left[{}\begin{matrix}2x-3=34\\-3x+1=34\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=\dfrac{37}{2}\\x=-11\end{matrix}\right.\)

b) \(\left(x+1\right)\left(5-5x\right)=0\)

\(\left[{}\begin{matrix}x+1=0\\5-5x=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-1\\x=-1\end{matrix}\right.\)

c) \(\left(2x+1\right)^3=45-\left(-19\right)\)

\(\left(2x+1\right)^3=64\)

\(\left(2x+1\right)^3=2^6\)

 

 

 

Answer 4

a) (2x-3)+ (-3x+1)=34

=>2x-3-3x+1=34

=>-x-2=34

=>-x=36

vậy x=-36

b(x+1).(5-5x)=0

 =>x+1=0 hoặc 5-5x=0

=>x=-1 hoặc x=1

c (2x+1)^3=45-(-19)

 

=>2x+1=4

=>2x=3

hay x=3/2

d 4x^2-3=13

 

=>x=2 hoặc x=-2