SOLUTION: I don't understand how to do this: 3 (c - 5) + 4c (c - 5) Could you show me how to do problems like these?

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}
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Answer by shree840(260) (Show Source): 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
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