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yes show me what you've done and the question
thats the answer i chose but it says it is wrong.... my answer choices are: -5+18sqrt5 -5+38sqrt5 35+20sqrt5 35+10sqrt5--- the answer i chose and it says it is wrong... I am not sure why or what i did wrong can someone please help??
the last bit is wrong its not -80 its -40
oh that was -8sqrt5
-5 + 18 sqrt 5
that last bit is -8 sqrt 5?
it shouldn't be it should be -40
yeah cause it is 2sqrt5*4sqrt5
yes that should give you - 40
how did you get-40?? im a little confused
5 * 4 = 20 * -2
where does the 5 come from? the sqrt?
so you take one of the 5's from one of the sqrt and leave the other one?
ok ignore the way i said let me try and explain the way you do it
so we have -2 sqrt 5 * 4 sqrt 5
-2 * 4 = -8
im sorry I just want to make sure i understand where the 5 comes from
sqrt 5 * sqrt 5 = 5
so we multiply -8 * 5 = -40
is that easier to understand?
oh so the sqrt * the same swrt will just be the number??
that makes perfect sense actually
let me know if your confused about anything
thank you soo much for explainging it and not just giving me the answer. if I have any other problem I will post them for sure. I really appreciate it
your welcome =)