Question

Completing the square. a^2+2a-3=0

Answer 1

a^2 + 2a - 3 = 0

a^2 + 2a = 3

a^2 + 2a + 1 = 3 + 1 (I added a 1 to both sides)

a^2 + 2a + 1= 4

(a + 1)^2 = 4

a = -3, 1