X² <span>+ 11x = -28 to find the solution of this polynomial, it'll be easiest to try and factor it. the first thing you need to do is move everything to one side:
</span>x² + 11x = -28 ... add 28 x² + 11x + 28 = 0 ... factor (x + 7)(x + 4) = 0 ... now set both of your factors equal to zero and solve for x