Which shows the factored form of x2 - 12x– 45?
(x+3)(x - 15)
(x-3)(x - 15)
(x + 3)(x + 15)
(x - 3)(x + 15)

The median segment divides the triangle into 2 isosceles triangles and everything else is trivial.|ad|=|bc|2=|bd|soδadb  is isosceles with∠dab=∠dbasimilarlyδadc  is isosceles with  ∠dac=∠dca∠cab=∠cad+∠bad=∠acb+∠abctherefore∠cab  is a right angleandbc  is the hypotenuse of a right-angled triangle.hope this