Help with multiplication of rational expression

[cgarcia71]

Hi I was wondering if someone can tell me if I did the following problem correctly?

Thank you.

-2a2 * 20a -2 * a2 * 2*2*5 = -40a
3a2 15a3 = 3 * a 3 * 5a 45a2


:?:

 

[Denis]

Hi I was wondering if someone can tell me if I did the following problem correctly?

Thank you.

-2a2 * 20a -2 * a2 * 2*2*5 = -40a
3a2 15a3 = 3 * a 3 * 5a 45a2


:?:

WHAT are you asked to do: solve for a?
Sorry, but what you've done simply makes NO SENSE.

Type the WHOLE problem; show a squared this way: a^2;
should 20a - 2 be bracketed?