Question 327882
{{{y=x^4+x}}}
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{{{graph(300,300,-4,4,-4,4,x^4+x)}}}
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Looks like two solutions in [{{{-3}}},{{{3}}}].
{{{x=0}}} and {{{x=-1}}}
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{{{y=4^x+4}}}
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{{{graph(300,300,-4,4,-1,7,4^x+4)}}}
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Looks like no solutions in [{{{-3}}},{{{3}}}].