Question

Mn giúp mik vs

Answer 1

1,5 điểm :)????

Answer 2

a)<=> 4x^2 - 4x - (x^2 - 9) = 9

<=> 4x^2 - 4x - x^2 = 0

<=> 3x^2 - 4x = 0 <=> x(3x - 4) = 0

<=> x = 0 hoặc x = 4/3

b)<=> \(\dfrac{x^2+1}{\left(x-2\right)x}=1\Leftrightarrow x^2+1=x^2-2x\Leftrightarrow2x-1=0\Leftrightarrow x=\dfrac{1}{2}\)