Question

square root of a^2_2a+1​

Answer 1

Answer:

cannot understand can you send it correctly

Answer 2

Answer:

a^2-2 a-1 = 0

Add 1 to both sides:

a^2-2 a = 1

Add 1 to both sides:

a^2-2 a+1 = 2

Write the left hand side as a square:

(a-1)^2 = 2

Take the square root of both sides:

a-1 = sqrt(2) or a-1 = -sqrt(2)

Add 1 to both sides:

a = 1+sqrt(2) or a-1 = -sqrt(2)

Add 1 to both sides:

Answer: | a = 1+sqrt(2) or a = 1-sqrt(2)