The graphs of $y_{1}=0.25 x^{4}$ and $y_{2}=0.25\left(x^{4}+x^{3}-23 x^{2}+3 x+90\right)$ are shown in the figure below as viewed on the window $[-10,10]$ by $[-25,25]$. What is the double zero of $y_{2}$ ?

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The Answer of The graphs of $y_{1}=0.25 x^{4}$ and $y_{2}=0.25\left(x^{4}+x^{3}-23 x^{2}+3 x+90\right)$ are shown in the figure below as viewed on the window $[-10,10]$ by $[-25,25]$. What is the double zero of $y_{2}$ ?

The Graphs Of y1=0.25x4y_{1}=0.25 x^{4}y1​=0.25x4 And y2=0.25(x4+x3−23x2+3x+90)y_{2}=0.25\left(x^{4}+x^{3}-23 x^{2}+3 x+90\right)y2​=0.25(x4+x3−23x2+3x+90) Are Shown in the Figure Below as Viewed on the Shown

The Graphs Of $y_{1}=0.25 x^{4}$ And $y_{2}=0.25\left(x^{4}+x^{3}-23 x^{2}+3 x+90\right)$ Are Shown in the Figure Below as Viewed on the Shown