Welcome :: Homework Help and Answers :: Mathskey.com

Recent Visits

  
Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

13,435 questions

17,804 answers

1,438 comments

771,173 users

math help!!11

0 votes

express 2√(21)-3√ (7) 0ver √7 + 4√ (3-8)over √4 in simplest form.

asked Nov 21, 2014 in PRECALCULUS by anonymous

1 Answer

0 votes

The radical expression is image

image

The square root of a negative number does not exist among the set of real numbers.

It gives imaginary value.

If the given expression is image

image

image

image

image

answered Nov 21, 2014 by david Expert
Hi david. The 2sqrt21  included in over  sqrt7, same with the other one  4sqrr3  invluded in over sqrt4 :) Sorry and thank you

It's ok.

I have a little confusion about the question.

I need clarification about the second one.

Is it image

Or

image.

The second one please and thank you.

The radical expression is image

image

{ Apply the radical property √(ab) = √(a)√(b) where a, b ≥ 0}

image

image

Cancel common terms.

image

image.

Related questions

asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 21, 2014 in PRECALCULUS by anonymous
asked Nov 15, 2014 in PRECALCULUS by anonymous
asked Nov 15, 2014 in PRECALCULUS by anonymous
asked Nov 15, 2014 in PRECALCULUS by anonymous
...