I repeated it because of this:
But when 9 is in a square root sign it gives two answers i.e -3 and 3.
I wanted him to be sure that the answer is only 3. 1 answer not 2.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Look the link you provided at page 4 concerning the square roots signs.
It says so:
When two numbers are multiplied within a square root, you can split it into a multiplication of two square roots.
But only when X and Y are both greater than or equal to 0.
My question is:
Which figure is equal to zero before the splitting will be possible?
Last edited by EbenezerSon (2013-11-17 20:35:26)
I know only one thing - that is that I know nothing