Medal & fan-What is the solution of n2 -49=0?
a. -7
b. 7
c.#7
d.No solution
my answer b

Question

Medal & fan-What is the solution of n2 -49=0?
a. -7
b. 7
c.#7
d.No solution 
 my answer b

anonymous · Answer

Is it $$n ^{2}$$?

anonymous · Answer

yes

anonymous · Answer

Then yes, It is B.

anonymous · Answer

OK TY I have another one -

anonymous · Answer

Ok ^.^

shiraz14 · Answer

what's C? is it +/-7?

anonymous · Answer

What is the solution of x2+64=0?
a.-5
b.8
c.#8
d.no solution

anonymous · Answer

It's $$x^{2}$$ Right?

anonymous · Answer

yeap

shiraz14 · Answer

@JuniorEinstein1: What's the # sign for option C in both cases?

anonymous · Answer

$$\pm both c symbols$$

shiraz14 · Answer

@JuniorEinstein1: OK, thanks. Then the answer to your first question is C.

anonymous · Answer

It's not A, Or B. So It's either C or D.

anonymous · Answer

I think it's D though.

anonymous · Answer

@ shiraz are you sure about example #1

shiraz14 · Answer

@JuniorEinstein1: The answer to your 2nd question is D.

anonymous · Answer

ty I picked d too But the first one is def c ?

shiraz14 · Answer

For Example #1,
n^2 - 49 = (n-7)(n+7) = 0
i.e. n = 7 or n = -7
So the answer is C.

anonymous · Answer

When you have an exponent you multiply it by itself...@shiraz14

anonymous · Answer

What is the lenght of a square with an area of 144x2?
a.12
b.12x
c.#12x
d.no solution 
c ?

shiraz14 · Answer

@blueweek77 : this is a quadratic equation which has 2 roots on the real number line - one at -7 and one at +7. This is not the same as saying that n = square root(49), in which case, n = 7 (since the square root is defined as >0).

anonymous · Answer

$$\pm for answer c$$

shiraz14 · Answer

@ JuniorEinstein1: Why don't you try the 3rd question?

anonymous · Answer

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