Answer: C) (x + 5i)(x - 5i)
<u>Step-by-step explanation:</u>
x² + 25 can be rewritten as x² - (-25)
Now use the difference of squares to factor: a² - b² = (a + b)(a - b)
√x² = x √-25 = 5i
--> x² + 25 = (x + 5i)(x - 5i)
Answer:
x8 + 1
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
The fraction sign can also be known as a division sign. So think of it as 3 divided by 5, which is C.
Answer:
1. 8 meters
2.1dk
Step-by-step explanation:
Answer:
The answer is <em>C</em>
Explanation: Given:A security alarm requires a four-digit code. The code can use the digits 0–9 and the digits cannot be repeated.
there is only 2 numbers which are greater than 7 i.e. 8 and 9. ∴ there is 2 possibility for first place.
For the remaining 3 digits there is 9 possibilities (including 1 which would left after choosing 1 from first place )
No of ways for the alarm code beginning with a number greater than 7= 2 P 1 x 9 P 3
<em>Total ways of code with 4 digits= 10 P 4.</em> Hope this helps :)
