Question

Please help
---> Medal and fan.

Answer 1

@Michele_Laino

Answer 2

here, we can write:
\[\large {x^2} - 2x - 3 = {x^2} - 2x + 1 - 1 - 3 = ...?\]

Answer 3

4?

Answer 4

hint:
\[{x^2} - 2x - 3 = {x^2} - 2x + 1 - 1 - 3 = {\left( {x - 1} \right)^2} - 4\]

Answer 5

\[\large {x^2} - 2x - 3 = {x^2} - 2x + 1 - 1 - 3 = {\left( {x - 1} \right)^2} - 4\]

Answer 6

so we can rewrite your equation,as follows:
\[\begin{gathered}
{\left( {x - 1} \right)^2} - 4 = 0 \hfill \\
{\left( {x - 1} \right)^2} = 4 \hfill \\
\end{gathered} \]

Answer 7

\[\left( x+?^{2}=4 \right)\]

Answer 8

the requested number is:
\[ - 1\]

Answer 9

yes!

Answer 10

thanks

Answer 11

thanks!