Question

Tìm x: 

-4( x - 1 )^2 + ( 2x - 1 )( 2x + 1 ) = -3

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Answer 1

DỂ QUÁ!!!!!!!!!!!!!!!!

TUI HK BIẾT LÀM

Answer 2

\(-4\left(x-1\right)^2+\left(2x-1\right)\left(2x+1\right)=-3\)   \(3\)

<=> \(-4\left(x^2-2x+1\right)+4x^2-1=-3\)

<=> \(-4x^2+8x-4+4x^2-1=-3\)

<=> \(8x-5=-3\)

<=>  \(8x=2\)

<=> \(x=\frac{1}{4}\)

Answer 3

        \(-4\left(x-1\right)^2+\left(2x-1\right)\left(2x+1\right)=-3\)

\(\Rightarrow-4\left(x^2-2x+1\right)+4x^2-1=-3\)

\(\Rightarrow-4x^2+8x-4+4x^2-1=-3\)

\(\Rightarrow8x-5=-3\)

\(\Rightarrow8x=2\Rightarrow x=0,25\)

Vậy \(x=0,25\)

Chúc bạn học tốt.

Answer 4

\(-4\left(x-1\right)^2+\left(2x-1\right)\left(2x+1\right)=-3\)

\(\Rightarrow-4\left(x^2-2x+1\right)+4x^2-1=-3\)

\(\Rightarrow-4x^2+8x-4+4x^2-1=-3\)

\(\Rightarrow8x-5=-3\)

\(\Rightarrow8x=2\Rightarrow x=0,25\)

\(\Rightarrow x=0,25\)

Vậy \(x=0,25\)

Code : Breacker