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March 28, 2015

March 28, 2015

Posted by **muma** on Thursday, November 10, 2011 at 8:02am.

(a) 47 (23 +36 -7 )

(b) (37 -2 )squared

(c) (1624)/(496)

(d) 7/(20 ) - 4/(12)

(e) (32)/(12) - (53)/(8 )

- math -
**Reiny**, Thursday, November 10, 2011 at 8:55amI will assume your is supposed to be a √

To do these, you should know the basic laws for radicals, such as

√a x √b = √(ab) etc.

I will do the first and last, give the others a shot

a)

4√7(2√3 + 3√6 - √7)

= 8√21 + 12√42 - 4√49

= 8√21 + 12√42 - 28

e)

3√2/√12 - 5√3/√8

= 3√2/(2√3) - 5√3/(2√2)

= 3√2/(2√3)**(√3/√3)**- 5√3/(2√2)**(√2/√2)**

= 3√6/6 - 5√6/4

= √6/2 - 5√6/4

= 2√6/4 - 5√6/4

= -3√6/4

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