document.write( "Question 499378: if f(x)=2x^3+Ax^2+8x-9 and f(2)=5, what is the value of A? \n" ); document.write( "

Algebra.Com's Answer #337642 by Gogonati(855) $\"\"$ $\"About$

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$\"f%282%29=2%2A2%5E3%2BA%2A2%5E2%2B8%2A2-9=4%2AA%2B23\"$ , since f(2)=5 we have 4*A+23=5, solving this \r
\n" ); document.write( "\n" ); document.write( "equation we get:4*A=-18 => A=-4.5 \n" ); document.write( "

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