Use the quadratic formula to solve the equation, which has one solution. y^2+2y+1=0 Enter your answer in the box. Write the number only. Do not include "y = " in your answer.

Answer: the solutions the equation is - 3 or 5

Step-by-step explanation:

The given quadratic equation is expressed as

y² + 2y - 1 = 0

The equation is already in the standard form of ax² + bx + c

The general formula for solving quadratic equations is expressed as

x = [ - b ± √ (b² - 4ac) ]/2a

From the equation given,

a = 1

b = 2

c = - 1

Therefore, it becomes

= [ - 2 ± √ (2² - 4 * 1 * - 1) ]/2 * - 1

= [ - 2 ± (8) ] / - 2

= ( - 2 + 8) / - 2. Or ( - 2 - 8) / - 2

= 6 / - 2 or - 10 / - 2

= - 3 or 5