Question

$x*(x-3)=4$

Answer 1

$x^{2} -3x=4 \\ \\ x^{2} -3x-4 =0 \\ \\ x^{2} -4x+x -4 =0 \\ \\ x(x+1) -4(x+1) =0 \\ \\( x-4)(x+1)=0 \\ \\ x-4 =0 =\ \textgreater \ x=4 \\ \\ x+1=0=\ \textgreater \ x=-1$