Question

The first three steps of completing the square to solve the quadratic equation 2? + 8x + 5 = 0 are shown

below.
Step 1: x² + 8.0 = -5
Step 2: x2 + 8x + 16 = -5+16
Step 3: (x + 4)2 = 11
What are the next 3 steps?

Answer 1

see explanation

Explanation:

take the square root of both sides

step 4 : x + 4 = ±
`√(11)` ( subtract 4 from both sides )

step 5 : x = - 4 ±
`√(11)`

step 6 : x = - 4 -
`√(11)` , x = - 4 +
`√(11)`

Answer 2

x = 3/2

Explanation:

Step 4: 2x + 8 = 11

step 5: 2x +8 - 8 = 11 -8

step 6: 2x/2 = 3/2

step 7: x = 3/2