Find the Missing Dividend or Divisor
- $\frac{40 x^{7}+20 x^{2}+12 x}{?}=10 x^{6}+5 x+3$

Multiple Choice

Find the missing dividend or divisor
- $\frac{40 x^{7}+20 x^{2}+12 x}{?}=10 x^{6}+5 x+3$

A) $4 x^{2}$
B) $4 \mathrm{x}$
C) $-4 x$
D) -4