American School algebra 2 help!?

giving answers counter-productive. if can't them, should re-work of course! however, here few hints:

first one, need remember if multiply 2 roots together, result root of answer. in other words √2 times √32 √64. i'm sure can that! likewise √2 times √18 gives straightforward , can subtract.

second one, i'd approach remembering formula a^2 - b^2 , multiplying top , bottom same thing, rational numbers on bottom.

questions using i, remember it's (imaginary) square root of minus one. squared -1 - , thus, instance, square root of -9 3i. rational numbers @ bottom of division term, multiply top , bottom same thing until looks more friendly.

simplify: √2(√32 - √18)

√x-√y/ √x+√y

(2i)*3

1/√-9

-1/3+i

these problems need finish exam! appreciated!

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