Working attached below. Hope this helps! Any questions let me know :)
Since they are independent events to find the probability of both is P(A) * P(B)
P(A) = P(Heads) =

P(B) = P(Roll ≥ 4) =

Now multiply those fractions together

= P(Heads & ≥ 4)
Equation: 5x² - 3x - 14
= 5x² - 10x + 7x - 14
= 5x(x - 2) 7(x - 2)
= (5x + 7)(x - 2)
In short, Your Answer would be: Option B
Hope this helps!