Question

como resolver 2x(x+3)=x(3x-1)

Answer 1

$2 {x}^{2} + 6x = 3 {x}^{2} - x \\ 3 {x}^{2} - 2 {x}^{2} - x - 6x = 0 \\ {x}^{2} - 7x = 0 \\ x(x - 7) = 0 \\ x = 0 \\ x - 7 = 0 \\ x = 7$
"x" vale 0 e 7