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3 years ago

(3k - 6)(5k² + 7k - 4) *

Mathematics

1 answer:

pashok25 [27]3 years ago

8 0

Answer:

15k³ - 9k² - 54k + 24

Step-by-step explanation:

(3k - 6)(5k² + 7k - 4)

distribute parentheses

= 3k * 5k² + 3k * 7k + 3k(-4) + (-6) * 5k² + (-6) * 7k + (-6)(-4)

apply minus - plus rules: + (-a) = -a, (-a)(-b) = ab

= 3 * 5k²k + 3 * 7kk - 3 * 4k - 6 * 5k² - 6 * 7k + 6 * 4

simplify: 3 * 5k²k + 3 * 7kk - 3 * 4k -6 * 5k² - 6 * 7k + 6 * 4:

= 15k³ - 9k² - 54k + 24

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