Answer:
C) (x + 3i)(x - 3i)
Step-by-step explanation:
(x + 3i)(x - 3i)
=x² - (3i)² [(a+b)(a-b)=a²-b²]
=x² - 9i²
=x² - 9(-1) [i²=-1]
= x² + 9
Answer:
x = -1
Step-by-step explanation:
2x + 3 = -3x -2
2x = -3x -5
5x = -5
x= -1
428,731 - 175,842 = 252,889
Answer:
7.) 7
10.) 0
Step-by-step explanation:
When it means "evaluate the function", it's in essence asking us to see what the function spits out when we feed it a certain input. Our inputs are our x values, which spit out a y value.
Evaluating the function when x = 1:
Let's look at where the function has an x value of 1. We see it near the bottom of the table and see the y value associated with the input is 7. So when the function is fed 1 as an input, it spits out 7.
Evaluating the function when f(x) = - 2:
This one is a weird because of the new notation. Just think of it as some value of f, which we don't know (so we represent it as an x-variable) must equal -2. So let's look at our table to find out where our output is -2. We find that when f(x) = -2 the input is 0. So the input which gives -2 is 0.
You might have to do the quadratic formula