Question 754058:
Answer by blueplanet(7)   (Show Source):
You can put this solution on YOUR website! The amount of Joan's savings is to be squared and then doubled. The amount will then be $45 more than her present savings. How much has she saved at present?
I need to put this into a quadratic equation and then solve, but I am finding it a little hard. Thanks.
Ans:
Let the present amount of Joan's savings be x.
According to the question, her present savings will be squared and doubled. This means the amount of her future savings will become 2*x^2.
But her future savings will be $45 more than her present savings. This means:
2*x^2 = x + 45 ------------- (1)
Solving this equation (i.e. equation 1), we get x = -9/2 or 5. x=-9/2 is not a realistic solution. So, the amount of her present savings should be $5.
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