Question

Решите уравнение.
$(2x + 1)(2x - 1) - 4 {x}^{2} = 1 - x$

Answer 1

$(2x+1)(2x-1)-4x^2=1-x\\(2x)^2-1^2-4x^2=1-x\\4x^2-1-4x^2=1-x\\-1=1-x\\x=1+1\\x=2$

Answer 2

$4 {x}^{2} - 1 - 4 {x}^{2} = 1 - x \\ - x = - 2 \\ x = 2$