Plz due one of the roots of the equation x2−13x+q=0 is 12.5. find the other root and the value of the coefficient q.

Let's factor the following polynomial to find the roots:
 x2-13x + q = 0
 Factoring we have:
 (x-12.5) * (x + a)
 Where,
 -12.5 + a = -13
 a = -13 + 12.5
 a = -0.5
 We now look for the coefficient q:
 q = -12.5 * a
 q = -12.5 * (- 0.5)
 q = 6.25
 The polynomial will then be:
 x2-13x + 6.25 = 0
 Its roots are:
 x1 = 12.5
 x2 = 0.5
 
 The other root and the value of the coefficient are:
 0.5 and 6.25 (Respectively)