document.write( "Question 259965: The function p(q) = q^2 - 7 and f(s) = 9. If 2f(s) = p(q), what is the value of q?\r
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Algebra.Com's Answer #191430 by rfadrogane(214)\"\" \"About 
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If f(s) = 9 and p(q) = 2f(s) = 2(9) = 18
\n" ); document.write( "so, subtituting to p(q) = q^2 - 7
\n" ); document.write( " 18 = q^2 - 7
\n" ); document.write( " 18 + 7 = q^2
\n" ); document.write( " q^2 = 25
\n" ); document.write( "taking the sq. root
\n" ); document.write( " q = +5 and -5 - -- ans
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