Question

The first three steps of completing the square to solve the quadratic equation x2 + 4x - 6 = 0, are

shown below.
Step 1: x2 + 4x =
Step 2: x2 + 4x +
Step 3: (x + 2)2 = 10
What are the next 3 steps?

Answer 1

step 1: x^2 + 4x = 6

step 2: x^2 + 4x + 4 = 6 + 4

step 3: (x + 2)^2 = 10

step 4: x + 2 = +/-sqrt(10)

step 5: x = sqrt(10) - 2, or x = -sqrt(10) - 2

Explanation: