Question

решите уравнение 64-(х+3)"=0

Answer 1

64 - (х + 3)^2 = 0

64 - x^2 - 6x - 9 = 0

x^2 + 6x - 55 = 0

D = 36 - 4*(-55) = 256 = 16^2

x = (-6-16)/2 = -11 или x = (-6+16)/2 = 5

Ответ 

х1 = -11

х2 = 5