Answer :

Ryan2
[tex]f(t)=t^4+t^2-5\\ \\ f(b)-f(-b)=b^4+b^2-5-[(-b)^4+(-b)^2-5]\\ \\ f(b)-f(-b)=b^4+b^2-5-b^4-b^2+5\\ \\ \boxed{f(b)-f(-b)=0} [/tex]
konrad509
[tex]f(b)-f(-b)=b^4+b^2-5-((-b)^4+(-b)^2-5)\\ f(b)-f(-b)=b^4+b^2-5-(b^4+b^2-5)\\ f(b)-f(-b)=b^4+b^2-5-b^4-b^2+5\\ f(b)-f(-b)=0 [/tex]

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