Answer:
To factor the expression -4a^(-5/4) + 8a^(-17/14), you can first factor out the common factor of 4a^(-17/14), which is the lowest exponent between the two terms:
-4a^(-5/4) + 8a^(-17/14) = 4a^(-17/14) * (-a^(1 + 3/4) + 2)
Now, let's simplify the expression inside the parentheses:
-a^(1 + 3/4) + 2 = -a^(4/4 + 3/4) + 2 = -a^(7/4) + 2
Now, you have:
4a^(-17/14) * (-a^(7/4) + 2)
This is the factored form of the expression.