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Answers by Lee W.

Hi Martin, An exponent of the form 1/n for a number n is taken to mean taking the nth root of the number. In this case, we're just working with n=2, which means a square root and should be familiar to you. 253/2 can be easily rewritten by taking the square root first. I'd rather not deal...

In the case that you mean (-4)4, it can be written out as (-4)(-4)(-4)(-4). Since multiplying two negatives gives a positive, this is equal to 16*16 = 256. More generally, (-x)n for x positive and n even will always yield a positive answer. If you mean to write -(44), the negative would stay...

1/x + 1/x^2 (answer)

Hey Christine, Just like regular old fractions, we want to find a common denominator for these guys. Let's multiply the 1/x by 1, but let's express 1 as x/x. (x/x)(1/x) + 1/x2 Multiplying that out, we get x/x2 + 1/x2 Now that we've found the common denominator, we...

I'm assuming that you're meaning to write the following: (36m5n5)/(12m3) In this case, we compare similar bases' exponents. We subtract the lesser from the higher number and keep the rest wherever the higher number is. More generally, if we have xn/xm, it would simplify to xn-m. You...

I'm assuming f is just a variable here, and not meaning a function of some variable s+k. In that case, I would need more information like what the function is. c = (1/3)f(s+k) Let's multiply out the right hand side to easily get access to our variable s. c = (1/3)fs + (1/3)fk Subtract...