Question

Tìm x biết 2x²+3x²+2x+3=0

Answer 1

sai de ban oi

Answer 2

(2x³+3x)+(2x+3)=0

=> x(2x+3)+(2x+3)=0

=>(x+1)(2x+3)=0

=> \(\left[{}\begin{matrix}x+1=0\\2x+3=0\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}x=-1\\x=-\dfrac{3}{2}\end{matrix}\right.\)

Answer 3

2x³ + 3x² + 2x + 3 = 0

<=> 2x³ + 2x + 3x² + 3 = 0

<=> 2x(x² + 1) + 3(x² + 1) = 0

<=> (x² + 1)(2x + 3) = 0

\(\Leftrightarrow \begin{bmatrix} x^{2} + 1 = 0 (VN) & & \\ 2x + 3 = 0 & & \end{bmatrix}\) pn bỏ dấu ngoặc bên phải nha

<=> 2x + 3 = 0

<=> x = \(\frac{-3}{2}\)

Vậy ...........