ax^2-bx-10 = 0 roots = -1, 5
Sum of roots = 4
Product of roots = -5
Sum of roots = (-b/a),
since b is -b and a is a, sum of roots = b/a
Product of roots = (c/a)
since c is -10 and a is a, product of roots = -10/a
now we have two simultaneous equations:
b/a = 4
-10/a = -5
solving this, we...