√32-(1/2)√8+2√50
=√(4^2*2)-(1/2)√(2^2*2)+2√(5^2*2)
=4√2-√2+10√2
=13√2
3√12-(3/4)√48+7√108
=3√(2^2*3)-(3/4)√(4^2*3)+7√(6^2*3)
=6√3-3√3+42√3
=45√3
①根号32减二分之一乘根号8加2乘根号50
√32-(1/2)√8+2√50
=√(4^2*2)-(1/2)√(2^2*2)+2√(5^2*2)
=4√2-√2+10√2
=13√2
3√12-(3/4)√48+7√108
=3√(2^2*3)-(3/4)√(4^2*3)+7√(6^2*3)
=6√3-3√3+42√3
=45√3