remove parentheses and simplify
5c+7d-2(4c-7d)
need help with math. Please help?
2009-02-23 7:49 am
回答 (10)
2009-02-23 8:00 am
✔ 最佳答案
5c+7d-2(4c-7d)=5c+7d-8c+14d=-3c+21d answer//
2009-02-23 4:04 pm
= 5c + 7d - 2(4c - 7d)
= 5c + 7d - 8c + 14d
= 21d - 3c
= 3(7d - c)
Answer: 3(7d - c) or 21d - 3c
= 5c + 7d - 8c + 14d
= 21d - 3c
= 3(7d - c)
Answer: 3(7d - c) or 21d - 3c
2009-02-23 4:11 pm
-3c + 21d
2009-02-23 3:58 pm
5c + 7d - 2(4c - 7d)
= 5c + 7d - 2*4c + 2*7d
= 5c + 7d - 8c + 14d
= 5c - 8c + 14d + 7d
= -3c + 21d
= -3(c - 7d)
= 5c + 7d - 2*4c + 2*7d
= 5c + 7d - 8c + 14d
= 5c - 8c + 14d + 7d
= -3c + 21d
= -3(c - 7d)
2009-02-23 3:56 pm
5c+7d-2(4c-7d)
5c+7d-8c+14d
(5c-8c)+(7d+14d)
-3c+21d
<factor out -3 gives:
-3(c-7d)>
5c+7d-8c+14d
(5c-8c)+(7d+14d)
-3c+21d
<factor out -3 gives:
-3(c-7d)>
2009-02-23 3:55 pm
You seriously can't do this yourself? No offense, but if you wanna do well in math, you should figure out "Please Excuse My Dear Aunt Sally." This applies to simplification as well. So first, you multiply the 2 and the stuff in the parentheses. Then you add all the numbers with common variables together.
2009-02-23 3:54 pm
5 c + 7 d - 8 c + 14 d
= - 3 c + 21 d
= 3 ( 7d - c)
= - 3 c + 21 d
= 3 ( 7d - c)
2009-02-23 3:54 pm
5c+7d-2(4c-7d)=5c+7d-8c+14d=-3c+21d
Final answer: -3c+21d
Final answer: -3c+21d
2009-02-23 3:54 pm
5c+7d-8c+14d =
21d-3c
thats the correct answer
21d-3c
thats the correct answer
2009-02-23 3:53 pm
Distributing the -2 gives you
5c + 7d - 8c + 14d
5c + 7d - 8c + 14d
收錄日期: 2021-05-01 12:08:04
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