Question

Indcar el desarollo de : ( 2 √7 - 1 ) ² 

Answer 1

(2√7 -1)², utilizamos productos notables ( a -b)² = a² - 2ab +b²

(2√7 -1 )² = (2√7)² -2(2√7)(1) + 1² = 2²*7 -4√7 +1= 4*7 -4√7 -1 = 28 -4√7 +1 = 29-4√7