Aku lupa caranya): hehe tolong dibantu yaaaa

1. √4.2+√25.3-(√16.2+√81.3)=
2√2+5√3-(4√2+9√3)=
2√2+5√3-4√2-9√3=
-2√2-4√3 (B)

2. 1+3√2-4+√25.3= (lgsng buka kurung aja)
1+3√2-4+5√2=
8√2-3(C)