SOLUTION: How do you complete the square for this question:y=2x^2+4x-2 ? I got y = 2(x+1)^2 - 2 but the answer says its y = 2(x+1)^2 - 4. Can someone please tell me where they got the -4 fr

Question 1115016: How do you complete the square for this question:y=2x^2+4x-2 ?
I got y = 2(x+1)^2 - 2 but the answer says its y = 2(x+1)^2 - 4. Can someone please tell me where they got the -4 from?
Thanks
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!

Term to complete the square is , which should be added and subtracted inside the parentheses.

Remultiply to distribute the factor 2.

Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.
For those who want to learn completing the square, there is the lesson in this site
    - HOW TO complete the square - Learning by examples

Read it and become an expert in the area.

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