Find the solution of four times the square root of the quantity of x plus 2 equals negative 16

Question

anonymous · Answer

$$4\sqrt{x+2} = -16$$

triciaal · Answer

first divide each side by 4
next square each side

triciaal · Answer

remember when you square a negative it becomes a positive

texaschic101 · Answer

4 sq rt (x + 2) = -16 --- divide both sides by 4
sq rt (x + 2) = - 4 
x + 2 = -4^2
x + 2 = 16
x = 16 - 2
x = 14......but I am not sure if it is (+/-) 14 or just 14

anonymous · Answer

$$\sqrt{x+2} =-4?$$

anonymous · Answer

oops, looks like you already posted :o

triciaal · Answer

it would just be 14

you only have +/- when taking the square root

anonymous · Answer

would 14 be extraneous or non-extraneous?

texaschic101 · Answer

thanks for clearing that up triciaal :)

anonymous · Answer

alright so what I understand is that you have to plug it in, but I'm not sure of how I'd be doing the equation?

I would do it pretty much the same way I'd be finding x?

anonymous · Answer

I found it to be extraneous c:

may I ask another question please? >.<

triciaal · Answer

based on your ? using a different approach
yes extraneous

triciaal · Answer

sure

anonymous · Answer

alright, thank you c:

my question is how would I simplify this: $$9\div 3 - 2i$$

it may seem easy but I'm rather lost with these

triciaal · Answer

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