5y4+25y3−70y25y^4+25y^3-70y^25y4+25y3−70y2
(x+9)(x+8)=0\left(x+9\right)\left(x+8\right)=0(x+9)(x+8)=0
x2=10x−29x^2=10x-29x2=10x−29
5x−8<25x-8<25x−8<2
2(2)4−7(2)3+8(2)2−7(2)+62\left(2\right)^4-7\left(2\right)^3+8\left(2\right)^2-7\left(2\right)+62(2)4−7(2)3+8(2)2−7(2)+6
18x+81x−9\frac{18x+81}{x-9}x−918x+81
−6x≤48-6x\le48−6x≤48
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