Question

Which equation is equivalent to x^2 + 2x – 3 = 0?

a) (x + 1)^2 = 4
b) (x – 1)^2 = 4
c) (x + 1)^2 = 2
d) (x – 1)^2 = 2

Answer 1

a) is the correct answer

Explanation:

When we expand a) we get

x^2+2x+1=4

Subtracting 4 on both sides we get x^2+2x+1-4=0

x^2+2x-3=0

Answer 2

I believe your answer should be: (A) (x+1)^2=4