(3√12-2√3分之1+√48)÷2√3 (1-2√3)(1+2√3)-(2√3-1)²
问题描述:
(3√12-2√3分之1+√48)÷2√3 (1-2√3)(1+2√3)-(2√3-1)²
答
(3√12-2√3分之1+√48)÷2√3
=(6√3-6分之√3+4√3)÷2√3
=(6-6分之1+4)÷2
=5-12分之1
=4又12分之11
(1-2√3)(1+2√3)-(2√3-1)²
=1-(2√3)平方-(2√3)平方+4√3-1
=1-12×2+4√3-1
=-24+4√3
答
(3√12-2√3分之1+√48)÷2√3
=(6√3-2√3/3+4√3)÷2√3
=3-1/3+2
=14/3
(1-2√3)(1+2√3)-(2√3-1)²
=1-(2√3)²-[(2√3)²-4√3+1)
=1-12-(12-4√3+1)
=-24+4√3