Răspuns:
Explicație pas cu pas:
a=6√5-12=√36*5-144=√36
b= √16*11-144=√32
√36> √32
-
x= 7-4√3=√49-√16*3=√49-48=√1
y= 7-5√2= √49-√25*2=√49-50=√1
√1=√1
-
-
a= √8-3-( 4-√18)=√8-3-4+√18=√8-7+√18=√2³-7+√3²*2=2√2+3√2-7=
5√2-7=5*1,41-7=7,05-7=0,5 >0 (pozitiv)
-
b= 2- [ 3√2-(4-√2)=
2- [3√2- 4+√2)=
2- ( 3√2+√2-4)=
2- (4√2-4)=
2-4√2+4=
2+4-4√2=
6-4√2=
6-4*1,41=
6-5,64= 0,36 >0 ( pozitiv)
-
-
b)
√8-3-(4-√18)- {2-[3√2-(4-√2)]}=
2√2-3-4+3√2- [2-(3√2-4+√2)]=
5√2-7- ( 2- [3√2-4+√2)=5√2-7-6+4√2=9√2-13
