Answer:
I believe the coefficient is -65.
Step-by-step explanation:
Step 1: First, you have to expand your problem. (Distribute in your parentheses.) (Left from right)
[tex]25d^{2} -30d-35d+42[/tex]
Step 2: Combine like terms and you're done.
[tex]25d^{2}[/tex] - 65 [tex]d +42[/tex]
