simplify: -9d^4 (2d+7)

Answer 1

To simplify -9d^4(2d+7), we can apply the distributive property.

First, distribute -9d^4 to both terms inside the parentheses:
-9d^4 * 2d - 9d^4 * 7

Simplify each term:
-18d^5 - 63d^4

Therefore, -9d^4(2d+7) simplifies to -18d^5 - 63d^4.