Chris13reyes Chris13reyes
  • 12-11-2020
  • Mathematics
contestada

Which of the following expressions is equal to 2x2 + 18 ?
O A. (2x - 9i)(x - 2i)
B. (2x-9i)(x +2i)
C. (2x-6i)(x +3i)
D. (2x - 6i)(x-3i)

Respuesta :

jimthompson5910 jimthompson5910
  • 12-11-2020

Answer: Choice C. (2x - 6i)(x + 3i)

Work Shown:

2x^2 + 18

2(x^2 + 9)

2(x - 3i)(x + 3i) .... see note below

(2x - 6i)(x + 3i)

Note: I used the rule that a^2 + b^2 = (a - bi)(a + bi). I recommend FOILing out the right hand side to confirm the equation is true. You'll use the idea that i^2 = -1.

Answer Link

Otras preguntas

Prepare an art integrated assignment (Chart tabulation of music, costume, region, language association) of haryana
Directions: Write T it the statement is 1. Radiant energy spreads out from its source in all directions. 2. Electromagnetic radiation includes only visible ligh
Which factors may increase the likelihood of a person using drugs?a.experiencing depressionb.family members using drugsc.favorite celebrities using drugsd.havin
20 years ago a top of the line video game console cost $500 if the inflation rate is 5% compounded continuously how much would that same console cost today?
find the amount of elapsed time between the pair 9:10 am to 4:44 pm
Please answer.. I really need help
Almost all the helium in the universe was formed between 2-15 minutes after the Big Bang. True or False?
In the given figure, what is the measure of angle x?
care for the responsive choking adult consists of cycles of which of the following? select 2 answers.a. Back blowsb. Abdominal thrustsc. Breathsd. CPRe. Finger
Write a letter to your mother asking for Some money to buy winter clother. ​