What is the squared root of 1440?

Answer 1

Julia Adams

37.95

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Answer 2

Abigail Allen

#12sqrt(10)#
Look at the method used!

Given: 1440

We need to look for portioning of this number such that we may easily spot things we can take the square root of. So lets play with it a bit!

#144 = 12 times 12# But we need 1440 so multiply by 10 giving

#1440 = 12 times 12 times 10#

#10# does not have any factors we can take the root of so lets look at the others.

We can factor 12 into #3 times 4# which we can use:

#1440 = 3 times 4 times 3 times 4 times 10#

Now we have something we can deal with:

#sqrt( 3^2 times 4^2 times 10)#

#3 times 4 times sqrt(10)#

#12sqrt(10)#

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.