Question 1090187
Find (fg)(4)
I way: (fg)(x)={{{(x^2+3)(-2x+6)=-2x^3+6x^2-6x+18}}}
(fg)(4)={{{-2*4^3+6*4^2-6*4+18=-38}}}
II way: {{{f(4)=4^2+3=19}}}
{{{g(4)=-2*4+6=-2}}}
{{{fg(4)=19*(-2)=-38}}}
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Find (f+g)(3)
{{{f(3)=3^2+3=12}}}
{{{g(3)=-2*3+6=0}}}
(f+g)(3)={{{12+0=12}}}
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Find (f/g)(5)
{{{f(5)=5^2+3=28}}}
{{{g(5)=-2*5+6=-4}}}
(f/g)(5)={{{28/-4=-7}}}
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Find (f-g)(4)
{{{f(4)=4^2+3=19}}}
{{{g(4)=-2*4+6=-2}}}
{{{(f-g)(4)=19-(-2)=21}}}
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Find (f+g)(-5)
{{{f(-5)=(-5)^2+3=28}}}
{{{g(-5)=-2*(-5)+6=16}}}
(f+g)(-5)={{{28+16=44}}}