document.write( "Question 287931: if f(x)=2x-3and g(x)=x^2+1 fog(-1) (gof) (4)I thank you in advanced please help me here .and with this onefind (f-g) (x) f(x) =x^2 -2x-24 and g(x)=x^2 -x-30 \n" ); document.write( "
Algebra.Com's Answer #208735 by stanbon(75887)\"\" \"About 
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If f(x)=2x-3 and g(x)=x^2+1 fog(-1) (gof)(4)
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\n" ); document.write( "fog(-1)
\n" ); document.write( "Step 1: find g(-1) = (-1)^2+1 = 1+1 = 2
\n" ); document.write( "So, f[g(-1)] = f(2)
\n" ); document.write( "Step 2: find f(2) = 2(2)-3 = (4-3) = 1\r
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\n" ); document.write( "\n" ); document.write( "find (f-g) (x) f(x) =x^2 -2x-24 and g(x)=x^2 -x-30 \r
\n" ); document.write( "\n" ); document.write( "(f-g)x = f(x)-g(x)
\n" ); document.write( "Step 1: subtract g(x) from f(x)
\n" ); document.write( "= (x^2-2x-24) - (x^2-x-30)
\n" ); document.write( "Sept 2: simplify
\n" ); document.write( "= -2x+x -24+30
\n" ); document.write( "= -x + 6
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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