Răspuns :
a=√8+√27=2√2+3√3
b=3√2-3√3
ma=[(2√2+3√3)+(3√2-3√3)]÷2=
=2√2+3√2+3√3-3√3÷2=
=5√2/2=
=2,5√2
b=3√2-3√3
ma=[(2√2+3√3)+(3√2-3√3)]÷2=
=2√2+3√2+3√3-3√3÷2=
=5√2/2=
=2,5√2