(4c - 3d)(3c + d) =
= 12c² + 4cd - 9cd - 3d² =
= <u>12c² - 5cd - 3d²</u>
One pair is 4.345+4.345 (which is the pair that does not involve grouping)
Answer: 3.75
Step-by-step explanation:
Yes you take 3 times 4 and receive 12 and 5 times 4 and receive 20