Question

va rog mult de tot acest exercitiu​

Answer 1

Explicație pas cu pas:

a)

a=2$\sqrt{3}$-5

b=3$\sqrt{2}$-2$\sqrt{3}$

c=-5+3$\sqrt{2}$

a+b-c=2$\sqrt{3}$-5+3$\sqrt{2}$-2$\sqrt{3}$+5-3$\sqrt{2}$

⇔a+b-c=0

b) a=2-√5

b=-4√7+2√5

c=√5-4√7

a+b-c=2-√5-4√7+2√5-√5+4√7⇔

⇔a+b-c=2-2√5+2√5-4√7+4√7⇔

⇔a+b-c=2

Answer 2

Răspuns:

2√3-5+3√2-2√3-(-5+3√2)=-5+3√2+5-3√2=0

2-√5+(-4√7+2√5)-(√5-4√7)=2-√5-4√7+2√5-√5+4√7=2