Question

Which choice represents the solution for x2 = 676?

Answer 1

Answer:

x = ±26

Step-by-step explanation:

676÷2=338

338÷2=169

169÷13=13

13÷13=1

then 676 = 2²×13² = 26²

then x² = 676 ⇔ x² = 26² ⇔ (x-26)(x+26) = 0 ⇔ x = 26 or x = -26