Verified answer

(4x-1) ²-16x²=13​

(4х-1)(4х-1)-16х²=13

16х²-4х-4х+1-16х²=13

-8х+1=13

-8х=13-1

-8х=12

х= 12 : (-8)

х= -1,5

Ответ: х= -1,5

[tex]\displaystyle (4x-1)^2-16x^2=13\\16x^2-8x+1-16x^2=13\\-8x+1=13\\-8x=13-1\\-8x=12\\\\x=-\frac{3}{2}=-1\frac{1}{2}=-1,5[/tex]