26 26*(5 -2√3) 26*(5 -2√3)
= = =
(5+2√3) (5+2√3)(5-2√3) 5² -(2√3)²
26*(5 -2√3) 26*(5 -2√3)
= = = 2*(5 -2√3) = 10-4√3
25 - 12 13
26 26*(5 -2√3) 26*(5 -2√3)
= = =
(5+2√3) (5+2√3)(5-2√3) 5² -(2√3)²
26*(5 -2√3) 26*(5 -2√3)
= = = 2*(5 -2√3) = 10-4√3
25 - 12 13