Question

Chodzi mi o zadanie numer 4!

Answer 1

Answer 2

(5√2+2√3)/(5√2-2√3) = (5√2+2√3)(5√2+2√3)/(5√2-2√3)(5√2+2√3)=
=(25*2+2*5√2*2√3+4*3)/(25*2 -4*3)=
=(62+20√6)/(50-12)=
=62/38 +20/38 √6=
=31/19 +10/19√6
a=31/19
b=10/19
c=6
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użyte wzory skróconego mnożenia
(a+b)² =a²+2ab+b²
(a+b)(a-b)=a² -b²