Respuesta :

ChoiSungHyun

Step-by-step explanation:

√7 + √7 = 2√7 (irrational)

√7 + (-√7) = 0 (rational)

√7 + 0 = √7 (irrational)

√7 + 7 = 7 + √7 (irrational)

The answer is the 2nd option / -√7.

SolarBubbles

Answer: The answer is the 2nd option / -√7.

Step-by-step explanation: