SOLUTION: You know that subtracting 15 times a number from twice the square of the number results in an answer of -27. How do I write the equation to represent this?

Question 94078: You know that subtracting 15 times a number from twice the square of the number results in an answer of -27. How do I write the equation to represent this?
Found 2 solutions by checkley75, bucky:
Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
2X^2-15X=-27
2X^2-15X+27=0
(2X-9)(X-3)=0
2X-9=0
2X=9
X=9/2
X=4.5 ANSWER.
X-3=0
X=3 ANSWER.
Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
Let x be the unknown number.
.
Then twice the square of this number is
.
15 times the number is . Subtracting this from twice the square of the number is:
.

.
And you are told that this has to equal -27.
.
Therefore, the equation you are looking for is:
.
.
.
Just in case you work out this equation, it has two solutions ... and
.
Hope this is of some assistance to you.
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