Question

36х^2-(3х-27)^2=0
Решите пожалуйста.

Answer 1

36x^2-(9x^2-2*2*27x+27^2)=0
36x^2-9x^2+162x-729=0 
27x^2+162x-729=0 /27
x^2+6x-27=0
D= 36+108=144
x1= -6√

Answer 2

x1= -6+12/2

Answer 3

x2= -6-12/2

Answer 4

x1=3

Answer 5

2=-9

Answer 6

x2=-9