Help please: Medal ...

Question

ams98 · Answer

$$\sqrt{x+8-6}=x$$

Find the solutions...??

anonymous · Answer

start by squaring both sides:

$$x +8 - 6 = x ^{2}$$

then you want to the equation = 0 to get into factored form:

$$x^2 -x -2 = 0$$

then use a factoring technique to get:

(x-2)(x+1)

x = 2 and x = -1

ams98 · Answer

That's what I got! But it's not one of the answer available!! @piglet9

anonymous · Answer

what are the choices?

ams98 · Answer

x = −4

 x = −7

 x = −4 and x = −7

ams98 · Answer

What about this one.... can you explain it?$$\frac{ 10 }{ 8-5i }$$

anonymous · Answer

f.y.i none of those answers work for the equation posted above so it is either written wrong or those are the wrong answers...

do you know what i = ?

ams98 · Answer

its imaginary numbers/complex numbers @piglet9

anonymous · Answer

i = sqrt(-1).  Does that help?

ams98 · Answer

well i have I in the equation... Its just being simplified and rewritten...?

anonymous · Answer

What does the question ask?

ams98 · Answer

it just says simplify..

anonymous · Answer

Well we can get rid of that i by squaring the whole thing.  Try it and tell me what you get.

ams98 · Answer

I got it I think but its way to much to write out xD thanks so much for your help!!

anonymous · Answer

No Problem.