## needhelpfastplease Group Title What is the value of the expression –3x^3 when x = –3? A. –81 B. –27 C. 27 D. 81 6 months ago 6 months ago

@kym02

2. kym02

Did you work it out?

i tried to @kym02 i think its C but im not quite sure

4. kym02

Alright i'll go it through with you. $-3x^{3}$ Hence, $x=-3$ so, $(-3) \times (-3) \times (-3) = -27$ so basically it now becomes: $-3(-27)$ which is equal to: $81$ Therefore, the answer is D :) you had it! just needed to keep trying! :D