(−2 + 7i) (4 − 2i).
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12:8 can also be written as 
To find the percent you have to do 12÷8 and that equals 1.5, then you have to do 1.5×100 and that equals 150. The ratio, 12:8 as a percent is 150%
The product of the greatest common divisor and the least common multiple of two numbers is always the product of the two numbers. So, you have
The parent square root function has a starting point at the origin. In standard form that would look like this: 
, where the number inside the radical with the x indicates side to side movement, and the number following either a + or a - indicates up or down movement. Our movement is up or down, since there is no number with the x under the radical. Because that is +2, our parent graph moves up to units from an original starting point of (0, 0) to a new one of (0, 2). Summary: the parent graph moves up 2 units, third choice above