# What's -4^2

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#1
What's -4^2??

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#2
is it 16 or -16?
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13 years ago
#3
Do you mean or ?

You didnt use brackets so I assume you mean the first. Thats just the negative of 4*4 therefore -16.
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13 years ago
#4
16. When the power is even the number is positive, but if the power was odd then the number stays negative.

eg. -4^2 = 16
-4^3 = -64
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13 years ago
#5
-4^2 is -16 because its the same as -1 x 4^2
(-4)^2 is +16 because -4 x -4 gives +16
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13 years ago
#6
(Original post by temt91)
16. When the power is even the number is positive, but if the power was odd then the number stays negative.

eg. -4^2 = 16
-4^3 = -64
Nope. -4^2 means -(4^2), which is -16; (-4)^2 is +16.
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13 years ago
#7
Its -16 because the - isn't inside a parentheses like (-4)^2 instead its -(4^2)
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#8
well -4 x -4 = + 16 so I would think 16...

however if it's solved like -(4^2) it would be -16
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13 years ago
#9
(Original post by WarmEye)
well -4 x -4 = + 16 so I would think 16...

however if it's solved like -(4^2) it would be -16
Yes, -4^2 means -(4^2) (as we all just told you). If you want to square -4, you have to put brackets round it: (-4)^2. Otherwise, -4^2 is minus the square of 4.
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13 years ago
#10
IT IS -16!!
it will be +16 if it was (-4)^2
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13 years ago
#11
(Original post by WarmEye)
well -4 x -4 = + 16 so I would think 16...

however if it's solved like -(4^2) it would be -16

I'll try to make you kinda understand why:

what -4^2 means, is actually 0-4^2

Therefore we can split it up into:
"0", "-" and "4^2"
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13 years ago
#12
So the op decided to ignore everyone's post above and still say it's 16
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13 years ago
#13
its 16
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13 years ago
#14
I'd say +16
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13 years ago
#15
(Original post by silent ninja)
So the op decided to ignore everyone's post above and still say it's -16
(Original post by valentine_strongrod)
its 16
?!
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13 years ago
#16
(Original post by valentine_strongrod)
its 16
Oh really? You should double check that, also read the rest of this thread.
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13 years ago
#17
hmm well the question is pretty stupid and vague...
if its -(4)^2 then its -16
but if its (-4)^2 then its 16
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13 years ago
#18
Technically, it's -16. BIDMAS, people. Use it, it's handy.

Though I have a feeling TC meant (-4)^2, which is 16.
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13 years ago
#19
(Original post by musicmobile)
I'd say +16
And you'd be wrong. Sorry.

(Original post by valentine_strongrod)
hmm well the question is pretty stupid and vague...
if its -(4)^2 then its -16
but if its (-4)^2 then its 16
No, the question is not stupid or vague. The expression "-4^2" clearly and unambiguously means "-(4^2)". It's half the people's answers in this thread that are stupid.
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13 years ago
#20
Is this GCSE or Alevel?
0
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