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Can somebody simplifiey these surds, and show their working?
Ok, so I've been having some trouble. In maths, we have been given a few problems, and I am not quite sure how to simplifiey them. Here are 2 of them, if you could show your working out, that would be great:
1) 3√6X5√3
2) -4√8X2√10
Thanks!
1 Answer
- salcompLv 78 years agoFavorite Answer
1)
3√6 * 5√3
= √(3^2*6) * √(5^2*3)
= √54 * √75
= √(54*75)
= √4050
= √(45^2*2)
= 45√2
2)
-4√8 * 2√10
= -√(4^2*8) * √(2^2*10)
= -√128 * √40
= -√(128*40)
= -√5120
= -32√5
