计算:
(√48+√27-√12)÷√6
=(4√3+3√3-2√3)÷√6
=5√3÷√6
=5/2√2
(3√5+2√3)(3√5-2√3)
=(3√5)²-(2√3)²
=45-12
=33
(2√7-3)²
=(2√7)²-2×2√7×3+3²
=28-12√7+9
=37-12√7
计算:
(√48+√27-√12)÷√6
=(4√3+3√3-2√3)÷√6
=5√3÷√6
=5/2√2
(3√5+2√3)(3√5-2√3)
=(3√5)²-(2√3)²
=45-12
=33
(2√7-3)²
=(2√7)²-2×2√7×3+3²
=28-12√7+9
=37-12√7