Răspuns :
2/(√7 - 3) + √7 + 4 =
= 2(√7 + 3)/(√7 - 3)(√7 + 3) + √7 + 4
= (2√7 + 6)/4 + √7 + 4
= (2√7 + 6 + 4√7 + 16)/4
= (6√7 + 22)/4
= (3√7 + 11)/2
2/(√7 - 3) + √7 + 4 =
= 2(√7 + 3)/(√7 - 3)(√7 + 3) + √7 + 4
= (2√7 + 6)/4 + √7 + 4
= (2√7 + 6 + 4√7 + 16)/4
= (6√7 + 22)/4
= (3√7 + 11)/2