document.write( "Question 635630: If f(x)=x^2+3x, find f(2-a) \n" ); document.write( "

Algebra.Com's Answer #400437 by unlockmath(1688) $\"\"$ $\"About$

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Hello,
\n" ); document.write( "If f(x)=x^2+3x, find f(2-a)
\n" ); document.write( "This is rewritten as:
\n" ); document.write( "f(x)=(2-a)^2+3(2-a):
\n" ); document.write( "Expand it out:
\n" ); document.write( "F(x)=4-4a+a^2+6-3a
\n" ); document.write( "Combine like terms:
\n" ); document.write( "F(x)=a^2-7a+10
\n" ); document.write( "Factor:
\n" ); document.write( "(a-5)(a-2)
\n" ); document.write( "a=5
\n" ); document.write( "a=2
\n" ); document.write( "Make sense?
\n" ); document.write( "RJ
\n" ); document.write( "www.math-unlock.com \n" ); document.write( "

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