Question 422262: I don't understand how to do this: 3 (c - 5) + 4c (c - 5) Could you show me how to do problems like these? Found 2 solutions by algebrahouse.com, shree840:Answer by algebrahouse.com(1659) (Show Source):
You can put this solution on YOUR website! "I don't understand how to do this: 3 (c - 5) + 4c (c - 5) Could you show me how to do problems like these?"
3(c - 5) + 4c(c - 5)
= 3(c) + 3(-5) + 4c(c) + 4c(-5) {used distributive property}
= 3c - 15 + 4c^2 - 20c {multiplied through}
= 4c^2 - 17c - 15 {combined like terms and wrote in decreasing order of exponents} www.algebrahouse.com
You can put this solution on YOUR website! It means 3*(c-5)+4c*(c-5) remember 3 is multiplied with both numbers inside the bracket and the sign with the number remains
3c-3*5+4c*c-4c*5
3c-15+4c^2-20c
4c^2-17c-15
