Answer:
C) 3x squared - 13x + 7
Explanation:
To subtract this problem you need to combine like terms
6x squared - 3x squared = 3x squared
-5x - 8x = -13
3 - -4 = 7
Since you combined the like terms put it back into an expression
3x squared - 13x + 7
Since the 13 is negative it becomes a subtraction sign in this expression.
The 7 is positive so it becomes an addition sign.