How do you write three hundred and twelve in place value
2 answers:
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Answer:
Step-by-step explanation:
Given
a: Reflect over x-axis
The rule of this is:
So, we have:
b: Shift 3 units left
The rule of this is:
So, we have:
You can't have a negative number under a radical that has an even index. We have an even index since we are dealing with the square root. Because of that we have to get the imaginary i involved. 
. Keeping that in mind, let's rewrite our problem: 
. If -1 equals i-squared, we can sub that in. Also, since 8 = 4*2 and 4 is a perfect square, let's break that down at the same time: 
. i-squared is a perfect square which can be pulled out as a single i, and 4 is a perfect square which can be pulled out as a 2. We will leave a 2 under the radical. Here's your simplification: 
, choice C from above.