Final answer:
The remainder when f(x)=5x^3-7x+5 is divided by x^2 is -7x+5.
Step-by-step explanation:
To find the remainder when f(x) = 5x^3 - 7x + 5 is divided by x^2, we can use polynomial long division.
Dividing 5x^3 - 7x + 5 by x^2 gives us a quotient of 5x and a remainder of -7x + 5.
So, the remainder when f(x) is divided by x^2 is -7x + 5. Therefore, the correct answer choice is B) -7.