4(-2)² + 8(-2) + 3(-2) + 6 =?
回答 (4)
2015-08-30 9:41 pm
4(-2)² + 8(-2) + 3(-2) + 6
= 4×4 - 8×2 - 3×2 + 6
= 16 - 16 - 6 + 6
= 0
= 4×4 - 8×2 - 3×2 + 6
= 16 - 16 - 6 + 6
= 0
2015-08-30 10:16 pm
16 - 16 - 6 + 6 = 0
2015-08-30 9:46 pm
4(-2)² + 8(-2) + 3(-2) + 6 =
(-2) (4(-2) + 8 + 3) + 6 =
(-2) (-8 + 8 + 3) + 6 =
(-2) (3) + 6 =
-6 + 6 =
0
(-2) (4(-2) + 8 + 3) + 6 =
(-2) (-8 + 8 + 3) + 6 =
(-2) (3) + 6 =
-6 + 6 =
0
2015-08-30 9:41 pm
-2 squared = 4
4 times 4 = 16
8 times -2 = -16
So those two cancel each other.
3 times -2 = -6
+ 6 =0
Your Answer is ZERO
4 times 4 = 16
8 times -2 = -16
So those two cancel each other.
3 times -2 = -6
+ 6 =0
Your Answer is ZERO
收錄日期: 2021-04-18 00:07:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150830133856AAZAGmN