<span>По формуле разности квадратов :
196t^2−(t−p)^2=(14t-t+p)(14t+t-p)=(13t+p)(15t-p)</span>
......................................
17) (Log(5) 36 + Log(5) 2 - Log(5) 8) * Log(9) 1/25 = Log(5) (36*2/8) * (-2Log(9) 5) = -Log(5) 9 * 2/Log(5) 9 = -2
18)