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

#3**+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**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