math help!!11

Question

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

Answer 1

The radical expression is

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

Comments

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

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It's ok.

I have a little confusion about the question.

I need clarification about the second one.

Is it

Or

.

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The second one please and thank you.

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The radical expression is

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

Cancel common terms.

.