What is the difference of the expression (1 + 4i) − (−16 + 9i)?

Mathematics

1 answer:

Solnce55 [7]3 years ago

7 0

Answer:

Step-by-step explanation:

(1+4i)-(-16+9i)

1+4i+16-9i

17-5i

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FINDE THE DOMAIN OF THE FUNCTION g(x)=roots x+7 write your answer using INTERVAL NOTATION.

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Answer:

Domain: [-7, ∞)

General Formulas and Concepts:

Algebra I

Domain is the set of x-values that can be inputted into function f(x)

Step-by-step explanation:

Step 1: Define function

g(x) = √(x + 7)

Step 2: Determine

We know that we cannot have a negative under the square root as it will produce imaginary numbers. Therefore, on a real number scale, the square root can be no less than or equal to 0.

We see from the function that in order to get 0 under the square root, x = -7. If we have x = -8, we would get -1 under the square root, thus giving us an imaginary numbers.

Therefore, our domain is x ≥ -7 or [-7, ∞).

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