Question

x² +3x (x-12)=0 qual a resposta

Answer 1

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

S={0,9}

Answer 2

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