3 years ago

Simplify (2 (radical 5) - 4) (3 (radical 5) +2)

1 answer:

6 0

$(2 \sqrt{5}-4 )(3 \sqrt{5}+2 )=\\2*3*5+2*2* \sqrt{5} -4*3* \sqrt{5}-4*2= \\ 30+4 \sqrt{5}-12 \sqrt{5}-8= \\ 22-8 \sqrt{5}$

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