(2^6)^x²-3x+20)<(2^-3)^2x²-6x-200
2^6x²-18x+120<2^-6x²+18x+600
6x²-18x+120<-6x²+18x+600
6x²-18x+120+6x²-18x-600<0
12x²-36x-480<0
x²-3x-40<0
x1+x2=3 U x1*x2=-40⇒x1=-5 U x2=8
+ _ +
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-5 8
x∈(-5;8)
(b+4)¹¹×(b+4)^5×(b+4)^5×(b+4)^6=<span>(b+4)^27</span>
49y^2-y^4=y^2(49-y^2)=y^2(7-y)(7+y).