计算:√34/√85x√2 √18+3√24-1/2√32 (7+4√3)(7-4√3)-(2√5-1)^2

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计算:√34/√85x√2√18+3√24-1/2√32(7+4√3)(7-4√3)-(2√5-1)^2计算:√34/√85x√2√18+3√24-1/2√32(7+4√3)(7-4√3)-(2√5-

计算:√34/√85x√2 √18+3√24-1/2√32 (7+4√3)(7-4√3)-(2√5-1)^2
计算:√34/√85x√2 √18+3√24-1/2√32 (7+4√3)(7-4√3)-(2√5-1)^2

计算:√34/√85x√2 √18+3√24-1/2√32 (7+4√3)(7-4√3)-(2√5-1)^2
√34/√85x√2
=√2x√17/√5x√17x√2
=√5/5
√18+3√24-1/2√32
=3√2+6√6-2√2
=√2+6√6
(7+4√3)(7-4√3)-(2√5-1)^2
=(49-48)-(21-4√5)
=4√5-20