(5√3+6√2)²5(5√3-6√2)²
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(5√3+6√2)²5(5√3-6√2)²
(5√3+6√2)²5(5√3-6√2)²
(5√3+6√2)²5(5√3-6√2)²
(5√3+6√2)²(5√3-6√2)²
=【(5√3+6√2)(5√3-6√2)】²
=【(5√3)²-(6√2)²】²
=【75-72】²
=3²
=9