SOLUTION: write in vertex form -2x^2-12x-y-21= 0
Algebra.Com
Question 597275: write in vertex form -2x^2-12x-y-21= 0
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Step 1: Move the 
and 
terms to the RHS:
Step 2: In the RHS only, factor out the lead coefficient:
)
Step 3: Divide the coefficient on the first degree 
term by 2, square the result, and add that result inside the parentheses. Multiply that value by the lead coefficient and add to the LHS to compensate:
)
Step 4: Collect terms in the LHS and factor the perfect square trinomial in the RHS:
^2)
Step 5: Add 3 to both sides, then multiply by -1:
^2\ -\ 3)
John
My calculator said it, I believe it, that settles it
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