Question

х-3x (1-12x )=11-( 5-6x)( 6x +5)

Answer 1

x-3x(1-12x)=11-(5-6x)(6x-5)
x-3x+36x^2=11-(30x-25-36x^2-30x)
-2x+36^2=11-30x+25+36x^2+30x
-2x+36^2+30x-36^2-30x=11+25
-2x=36
-x=18
x=-18
x^2-это x в квадрате