-3(3k+5)² extend and simply?
回答 (7)
2020-08-21 2:01 pm
-3 (3k + 5)²
= -3 [(3k)² + 2(3k)(5) + 5²]
= -3 [9k² + 30k + 25]
= -27k² - 90k - 75
= -3 [(3k)² + 2(3k)(5) + 5²]
= -3 [9k² + 30k + 25]
= -27k² - 90k - 75
2020-08-21 8:08 pm
-3(3k + 5)^2 =
-3(9k^2 + 15k + 15k + 25) =
-3(9k^2 + 30k + 25) =
-27k^2 - 90k - 75
-3(9k^2 + 15k + 15k + 25) =
-3(9k^2 + 30k + 25) =
-27k^2 - 90k - 75
2020-08-21 5:03 pm
-3(3k+5)²
BIDMAS (Work out brackets first)
= -3(9k² + 30k + 25)
= -27k² - 90k - 75
= 27k² +90k + 75
BIDMAS (Work out brackets first)
= -3(9k² + 30k + 25)
= -27k² - 90k - 75
= 27k² +90k + 75
2020-08-22 2:23 am
-3(3k + 5)
= -27 k^2 - 90 k - 75
= -27 k^2 - 90 k - 75
2020-08-21 6:52 pm
-3(3k+5)^2 = -3(9k^2+30k+25) = -(27k^2+90k+75).
2020-08-21 1:29 pm
Simply what? Simply Ming?
2020-08-21 9:29 pm
=> -3(3k+5)^2
=> (-9k+15)^2=> (-9k+15)(-9k+15)=> 81k^2 -270k +225
Divide all terms by 9 => 9k^2 -30k +25
=> (-9k+15)^2=> (-9k+15)(-9k+15)=> 81k^2 -270k +225
Divide all terms by 9 => 9k^2 -30k +25
收錄日期: 2021-04-24 08:02:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200821052718AAppeYp