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Hi guys i need help with these two algebra problems, thanks!

Hi Guys I Need Help With These Two Algebra Problems Thanks class=

Sagot :

Answer:

20) [tex]11x^2+13x+6[/tex]

21) [tex]-x^2+5x-3[/tex]

Step-by-step explanation:

20)

[tex]2f(x)+3g(x)=2(4x^2-x+3)+3(x^2+5x)=8x^2-2x+6+3x^2+15x=\boxed{11x^2+13x+6}[/tex]

21)

[tex]f(x)-g(x)=(3x^2-2x+5)-(4x^2-7x+8)=3x^2-4x^2-2x+7x+5-8=\boxed{-x^2+5x-3}[/tex]

And we're done!

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