Question

.Решите уравнение: (2х + 5)2 – (2х – 3)(2х +1) = 4.

Answer 1

4x + 10 - 4x² + 2x - 6x - 3 = 4
- 4x² = -3
x² = 3/4
x = √3/2

Answer 2

$4x+10-(4x^2+2x-6x-3)=4$
$-4x^2+8x+9=0$
$x_1= frac{2- sqrt{13} }{2}$
$x_2= frac{2+ sqrt{13} }{2}$