Question

rozwiaz rownanie 27X^3+27X^2-25X-25=0

^ POTEGA pilne jutro bede miala to na sprawdzianie

Answer 1

27x³ + 27x² - 25x - 25 = 0

27x²(x + 1) -25 (x + 1) = 0

(x + 1)(27x² - 25) = 0

(x+1)(3√3 x - 5)(3√3 x + 5) = 0

 

x+1=0          3√3 x - 5=0       3√3 x + 5=0

x=-1              x=5/3√3                x=-5/3√3

                     x=5√3/9                 x=-5√3/9