SOLUTION: Please help : Complete the square as an aid in graphing : y = x^2 + 2x - 1

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Question 66338This question is from textbook An Incremental Development
: Please help :
Complete the square as an aid in graphing :
y = x^2 + 2x - 1
This question is from textbook An Incremental Development

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Complete the square as an aid in graphing :
y = x^2 + 2x - 1
---------
x^2+2x+? = y+1+?
Complete the square to get:
x^2+2x+1=y+1+1
Factor the left side to get:
(x+1)^2 = y+2
Solve for y, as follows:
y=(x+1)^2-2
Cheers,
Stan H.

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