Răspuns :
x=√7-√5
y=√7+√5
ma=(√7-√5+√7+√5)/2=2√7/2=√7
mg=√(√7-√5)(√7+√5)=√7-5=√2
x²+y²=(√7-√5)²+(√7+√5)²=7-√35+5+7-√35+5=24
y=√7+√5
ma=(√7-√5+√7+√5)/2=2√7/2=√7
mg=√(√7-√5)(√7+√5)=√7-5=√2
x²+y²=(√7-√5)²+(√7+√5)²=7-√35+5+7-√35+5=24