Question

...x2+2x+x=0.........​

Answer 1

${x}^{2} + 3x = 0 \\ x(x + 3) = 0 \\ x = 0 \\ x + 3 = 0 ...... x = - 3$

Answer 2

Answer:

by spliiting the middle term

${x}^{2} + x + x + x = 0$

$x(x + 1) + 1(x + 1) = 0$

$(x + 1)(x + 1) = 0$