Question 999756
Within 11 years, the age of peter will be half the square of the age he was 13 years ago. Calculate current age of peter. 
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Equation:
p+11 = (1/2)(p-13)^2
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2p + 22 = p^2 - 26p + 169
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p^2 - 28p + 147 = 0
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peter's age = 21
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Cheers,
Stan H.
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