simplify the following expression?

Question

Simplify the following expression as much as possible:

(8u^ SQRT 63ux^2) -x SQRT 28u^5)

Assume that all variables represent positive real numbers.

This is where I cannot understand the real number variables

I have attempted the equation in my algebrator, and I have a hard time with SQRT. The difference of cube root
and sqare root is what hold me up.

Sometimes people can be so rude, how am I to learn this if someone doesn't help me?

Answer 1

This cannot be simplified without guessing because the problem is ambiguos for the following reasons:

1) You have an odd number of parentheses. You have one open parenthesis and two close parentheses.

2) It is unclear what the exponents are. Following the u^ you should always enclose in parentheses what you intend the exponent to be. Exception is when it is totally clear as in u^5.

One cannot tell what part of SQRT 63ux^2 is the intended exponent of u.

My guess is that the expression should be (8u^(sqrt63))(ux^2) -
x*sqrt(28u^5). If this guess is accurate, then:

8u^(3*sqrt(7))(ux^2)-x*2u^2*sqrt(7) =
2ux[4u^(3sqrt(7))x-2sqrt(7)]

But my guess is probably wrong. Hope I was not rude.

Answer 2

I think that they mean
(8u^ 2 SQRT 63ux^2) -x SQRT 28u^5)

Answer 3

I think your answer is in your book, find it. Why do people want other people to do their homework? Would that help you on a test? hmmm