Question

- Which of the following statements describes the solution to the product in the previous question? Select (2 points)
all that apply.
The answer is not a complex number because complex numbers are not closed under multiplication.
The answer is a complex number because complex numbers are closed under multiplication.
The answer is not a complex number because it cannot be written in the form a +bi.
The answer is a complex number because it can be written in the form a + bi.

Answer 1

Answer: B and D

Step-by-step explanation:

Answer 2

Answer:

A number that can be expressed in the form of $\[(a+bi)\]$ is called the complex number , where $\[a,b\]$ are real numbers and $\[i\]$ is imaginary numbers.

Step-by-step explanation:

• Given problem $\[(-2+i)(3-6t)\]$ we have to find that the given number is complex or not . In order to do so we have to expressed the number in form of $\[(a+bi)\]$ .

• If we got this form then number is complex number otherwise it is real number.

       $& (-2+i)(3-6t) \\ & -6+3i+12t-6ti \\ & (-6+12t)+i(3-6t)$

• We got the $\[(a+bi)\]$ form .Therefore number is complex number.

• Hence option four is correct.

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