Question

(-30x)(3x) =

Answer 1

-90x^2

Answer 2

-90x^2

Answer 3

http://www.wolframalpha.com/

Answer 4

You can always commute multiplication:

\[(-30x)(3x) = -30\cdot x \cdot 3\cdot x = -30\cdot 3 \cdot x\cdot x = (-30\cdot 3)x^2 = -90x^2\]

Answer 5

-30x*3x=-90x^2

Answer 6

This and 3 subsequent easy questions, 20 medals, lol...