help me?? pake caranya

a. √48+√75+√147
=4√3+5√3+7√3
=16√3
b. 4√5-√20+√45
=4√5-2√5+3√5
=5√5
d. (5+2√6)(5-2√6)
=25-10√6+10√6-24
=1
e. (5√3-2√6)^2
=(5√3-2√6)(5√3-2√6)
=75-10√18-10√18+24
=51-20√18
=51-60√2
f. (4√2+3√6)^2
=(4√2+3√6)(4√2+3√6)
=32+12√12+12√12+54
=86+24√12
=86+48√3
Semoga membantu..