SaraTheWeirdoo
contestada

The first three steps of completing the square to solve the quadratic equation x^2+4x-6=0 are shown below.

Step 1: x^2+4x=6
Step 2: x^2+4x+4=6+4
Step 3: (x+2)^2=10

What are the next 3 steps?

Respuesta :

altavistard
Take the sqrt of both sides of (x+2)^2=10:

x+2 = plus or minus sqrt(10)

Solve for x:  x = -2 plus or minus sqrt(10)

Evaluate x:  x = -2 + sqrt(10)  AND  x = -2 - sqrt(10)       (answers)

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