Answer:
d
Step-by-step explanation:
We know that a square root is a number that when multiplied by itself, makes a certain number. That sounds vague, but you probably have some intuition about this concept. You may realize that the square root of 9, for example, is 3, because 3 times 3 is 9. But -3 is also a square root of 9. Indeed, -3 times -3 is 9.
Now this is an interesting property. These two numbers both make positive 9. But what about -9? What number multiplied by itself gives -9?
You may recall that the product of two positive numbers is positive, and that the product of two negative numbers is also positive. The square root, by definition, requires that the number times itself equals its square, so we can't have two numbers of different signs. Thus, you can't "really" have the square root of a negative number.
But some clever mathematicians—Euler and Gauss—didn't accept this dogma. They defined our familiar numbers as "real" numbers, denoted ℝ, and made a new set of num
bers. These are called "imaginary" numbers (no joke), whose set of numbers are sometimes denoted ℂ (there's a bit more nuance to this definition). The imaginary numbers allow you to have a square root for a negative number. They are defined such that
, or
. This has opened up an unbelievable number of pathways in mathematics, but I'm sure you'll learn about it in due time. :)
Answer:
C
Step-by-step explanation:
Here, we want to reflect over the y-axis
by reflection over the y-axis, (x,y) becomes (-x,y)
Thus, we simply are going to negate the x values of the points given
So the correct answers are;
P’(4,-8)
Q’ (6,6)
R’ (-1,-7)
Answer:
356 students?
Step-by-step explanation:
Am I Right? i always saying "am i right" because all i thought im wrong
Answer:Let
x-----------> the number
we know that
The expression "the difference between five times a number and twice that number" is equal to
5x-2x
therefore
the answer is
5x-2x