А) ((a^3)^-3 * (a^-7)^-2)/((a^-2)^-4 : (a^-2)^3 = (a^-9 * a^14)/(a^8 : a^-6) = a^5/a^14 = a^-9
б) (-(4a/3b^-3))^-2 * (a^-2/8b^4)^-1 = (-(3b^-3/4a))^2 * (8b^4/a^-2) = (9b^-6/16a^2) * (8b^4/a^-2) = 72b^-2/16 = 4,5b^-2
35+25x^2-1=25x^2+20x+4
35-1=20x+4
34=20x+4
-20x=4-34
-20x=-30
x= 3/2
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