Answer:
Domain is [-9,-6] U [4,7]
Step-by-step explanation:

Range is {25, 64}. Range is the y value
LEts plug in 25 for f(k) and solve for k

Subtract 25 on both sides

Product is -24 and sum is +2. factors are 6 and -4



Do the same and solve for x when f(x)= 64

Subtract 64 on both sides

Product is -63 and sum is +2. factors are 9 and -7



We got k values, -9,-6,4,7
Domain is [-9,-6] U [4,7]