Question

X²+3x(x-12)=0 resposta ?

Answer 1

x²+ 3x² - 36x=o
4x²-36=o
b²-4ac
0²-4.4.36=
-576

Answer 2

$x^{2} + 3x(x-12) \\ x^{2} +3 x^{2} -36x \\ 4 x^{2} -36x \\ 4x(x-9) \\ x'=0 \\ x''=9$