X=-7 AB=-72
steps
since m is a midpoint, AM and MB are congruent so you set the two equations equal to each other, 4x-9=5x-3/3( is this a typo? bc 3/3 is 1)
subtract 4x from both sides m, -8=x-1
add 1 to both sides
x=-7
then plug -7 in for x 4(-7)-8=-36
since the two segments are congruent u do -36 x 2= -72
Answer:
I belive the answer is 1/324
F(x) = (x -2)(x +3)(x +5)
.. = x^3 +6x^2 -x -30 . . . . . your polynomial in standard form.