Question Number 104141 by bobhans last updated on 19/Jul/20

Answered by bramlex last updated on 19/Jul/20

[ 1   x   2 ]  [((2x+2)),((      2)),((      1)) ]= 0  ⇒ 2x+2 +2x + 2 = 0  4x = −4 ⇒x = −1