Question

Simplify using the vertical method.

Answer 1

Answer:

(D) $9k^3-3k^2-29k-12$

Step-by-step explanation:

The given expression is:

$(3k+4)(3k^2-5k-3)$

Upon simplifying the above expression, we get

=$3k(3k^2-5k-3)+4(3k^2-5k-3)$

=$9k^3-15k^2-9k+12k^2-20k-12$

Solving the like terms together, we have

=$9k^3-3k^2-29k-12$

which is the required simplified form of the given expression.

Hence, option D is correct.