Christ Centered Gamer

what is the square root of -9?

plus or minus 3i
glad to see there are other homeschoolers here.

FloatingNose wrote:plus or minus 3i
glad to see there are other homeschoolers here.

YUUUSSSSSS!!!! educated homeschoolers for the win!!!! xD

Lol I used the calculator and got Invalid Input..... +-3 is the only logical answer.

i is the equivalent of the square root of -1. floatingnose's answer was incorrect, but it is still obvious that he knows something


The correct answer to the square root of -9, is just (positive)3i.

oregorn1997 wrote:The correct answer to the square root of -9, is just (positive)3i.

Nope. positive or negative 3i. A square root of a number is a number that, when multiplied by itself, will produce said number. 3i is a square root of -9 because it produces 9*-1, which equals -9. However, -3i is also a square root.
-3i = -1 * 3 * i
(-1 * 3 * i) * (-1 * 3 * i) = (1 * 9 * -1) = 9 * -1 = -9
Therefore, the square root of -9 is equal to plus or minus 3i

FloatingNose's answer was correct. Micah's answer was incorrect. Oregorn was only partially correct.

So I don't think that is my grade level but I learned something.
SOLVE!!!
(6y + 12)2
(that two is supposed to be a Exponent/power)

Can't solve for the variable unless I have both sides of the equation.

But, factoring out:
(6y + 12) squared =
36y^2 + 144y + 144

btw, helpful fact for you Micah: "^" means "to the power of"

So, 5^8 means 5 to the 8th power.


Makes things a lot easier

Ya I do that in math class but I didn't know that actually meant that. well thanks for letting me know. and lego you are right.

You guys stop talking math. :O

why are you guys so smart?

because we are homeschoolers

micah211 wrote:because we are homeschoolers

Tis the Truth.

I Still listen to Adventures in Odyssey. My Favorite Character would be Eugene, second favorite either Jason Whittaker or Bernard Walton.