+130511 I think that we're trying to solve for "x" here and m is denoting meters....so we have
91 = (2x+3)(x+2) simplify on the right
91 = 2x^2 + 3x + 4x + 6
91 = 2x^2 + 7x + 6 subtract 91 from both sides
2x^2 + 7x - 85 = 0 factor
(2x + 17) (x - 5) = 0
Set each factor to 0
2x + 17 = 0 x - 5 = 0
subtract `17 from both sides add 5 to both sides
2x = -17 x = 5
divide both sides by 2
x = -17/2
So...the solutions are x = -17/2 or x = 5
