Răspuns:
Explicație pas cu pas:
a=5√5-3 b=7√2+2 c=8-2√2 d=√5-√2
a+c-(b+d)=5√5-3+8-2√2 -(7√2+2+√5-√2)=5+5√5-2√2-2-6√5+√2=
=3-√5-√2
b) a=-6√3+5 b=2√2-4 c=√3-√2 d=8√2+√3
-6√3+5+√3-√2 -(2√2-4+8√2+√3)=-5√3-√2+5-10√2-√3+4=
=-6√3-11√2+9
c) a=1+2x b=5-x c=-5x d=8+x √x²=IxI=x x≥0
1+2x-5x-(5-x+8+x(=1-3x-13=-12-3x=-3(4+x)
