计算二次根式的加减法:(1)根号2(根号2-根号3)+根号16 (2)(根号8/27-5根号3)*根号6(3)(5+根号6)(5根号2-2倍根号3)
问题描述:
计算二次根式的加减法:(1)根号2(根号2-根号3)+根号16 (2)(根号8/27-5根号3)*根号6
(3)(5+根号6)(5根号2-2倍根号3)
答
=2-根号6+4=6-根号6
=根号16/9-15根号2=4/3-15根号2
=25根号2+15根号3-10根号3-6根号2=19根号2+5根号3
答
计算二次根式的加减法:
(1)根号2(根号2-根号3)+根号16
=2-根号6+4
=6-根号6
(2)(根号8/27-5根号3)*根号6
=(2/9根号6-5根号3)*根号6
=4/3-15根号2
(3)(5+根号6)(5根号2-2倍根号3)
=25根号2-10根号3+10根号3-6根号2
=19根号2