SOLUTION: Please help me solve this problem (9sprt6-7sqrt5)(sqrt6-2sqrt5) Thanks Cathy

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Question 239251: Please help me solve this problem
(9sprt6-7sqrt5)(sqrt6-2sqrt5)
Thanks
Cathy
Answer by josmiceli(6798) About Me  (Show Source):
You can put this solution on YOUR website!
%289%2Asqrt%286%29+-+7%2Asqrt%285%29%29%2A%28sqrt%286%29+-+2%2Asqrt%285%29%29
9%2Asqrt%286%29%2Asqrt%286%29+-+7%2Asqrt%285%29%2Asqrt%286%29+-+18%2Asqrt%286%29%2Asqrt%285%29+%2B+14%2Asqrt%285%29%2Asqrt%285%29
9%2A6+-+7%2Asqrt%2830%29+-+18%2Asqrt%2830%29+%2B+14%2A5
9%2A6+%2B+14%2A5+-+25%2Asqrt%2830%29
54+%2B+70+-+25%2Asqrt%2830%29
124+-+25%2Asqrt%2830%29 answer
I can check this answer on my calculator
%289%2Asqrt%286%29+-+7%2Asqrt%285%29%29%2A%28sqrt%286%29+-+2%2Asqrt%285%29%29+=%28+9%2A2.449+-+7%2A2.236%29%2A%282.449+-+2%2A2.236%29
%28+9%2A2.449+-+7%2A2.236%29%2A%282.449+-+2%2A2.236%29+=+%2822.041+-+15.652%29%2A%28-2.023%29
6.389%2A%28-2.023%29+=+-12.925
and
124+-+25%2Asqrt%2830%29+=+124+-+5.477%2A25
124+-+136.931+=+-12.931
I think I made a rounding-off error, but
answer must be OK