+0  
 
0
83
5
avatar+9 

Hi

am using sharp el-w531.  When i type 5(-2)^4 it causing syntax error. 

Cant calculate power of a negative number.  Is there any way around it?

thanks. 

xvc007  Mar 12, 2017

Best Answer 

 #2
avatar+9 
+5

You mean after 5? Tried but same

xvc007  Mar 12, 2017
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5+0 Answers

 #1
avatar+90567 
+5

Maybe you just need to put the times sign in?

Melody  Mar 12, 2017
 #2
avatar+9 
+5
Best Answer

You mean after 5? Tried but same

xvc007  Mar 12, 2017
 #3
avatar+4716 
+6

Here's one way around it.

5(-2)^4 = (5)*(-2)*(-2)*(-2)*(-2)

 

That should give you 80.

hectictar  Mar 12, 2017
 #4
avatar+44 
0

Here is a lesson on powers of a negative number:

It's the same thing as positives, except you have to consider the negatives.

SO:

-2^1 = -2, because -2 * 1 = -2,

-2^2 = 4, because the negatives cancel out,

-2^3 = -8, because you are multiplying 4 from the previous one by -2,

-2^4 = 16, because the negatives cancel out again.

So (-2)^4 = 16

And 16 * 5 as you hopefully know

= 80

Pasplox  Mar 12, 2017
 #5
avatar+90567 
0

You answers are not all correct Pasplox  :(

 

 

-2^1 = -2, because -1*2 ^ 1 =-1*2=-2

-2^2 = -1*2^2= -4

-2^3 = -1*2^3= -8

-2^4 = -1*2*4= -16

ALL the above answers are negative!

 

BUT

So (-2)^4 REALLY DOES EQUAL  16

 

The brackets make all the difference :)

Melody  Mar 13, 2017

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