SOLUTION: What is the value of a in the standard form of the equation -x² +6x + 18 = 0?

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Question 1184580: What is the value of a in the standard form of the equation -x² +6x + 18 = 0?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) (Show Source):
You can put this solution on YOUR website!
c, from the typical model for a quadratic equation
This is very obvious what "c" is for yours.

Answer by ikleyn(52778) (Show Source):
You can put this solution on YOUR website!
.

The standard form of a quadratic equation ONLY defines the form of the equation,
but DOES NOT DEFINE the values of the coefficients.

The values of the coefficients can be all multiplied by any non-zero coefficient, leaving the equation EQIVALENT;
THEREFORE, the values of the coefficients in the standard form quadratic equation are defined only accurate to the common non-zero multiplier.

Therefore, all your attempts to "invent" a new class of Algebra problems are empty and make no sense.