Question

-9y^2(-4y^9)

Answer 1

\[- \times - = +\]\[9 \times 4 = 36\]
And so,

\[-9 \times -4 = 36\]

Answer 2

For the variables, we will add the exponents,
\[\Large y^2 \times y^9 = y^{11}\]

Finally your answer will be,

Answer 3

its using exponents

Answer 4

\[\Huge 36 y ^{11}\]

Answer 5

\[\large -9y^2(-4y^9) \to 36y^{11}\]

Answer 6

wlbrt: I answered this same question for you in your earlier post: http://openstudy.com/updates/4f29b67be4b049df4e9de0fc