simplify (7)/(2a)*5/(a^2)

a. 35/(2a^2); where a ≠ 0
b. 35/(2a^2)
i know the answer is one of these two and not c or d, but im not sure if its a or b

1 answer

7 / ( 2 a ) ∙ 5 / a² = 7 ∙ 5 / ( 2 a ∙ a² ) = 35 / 2 a³