Question

решить уравнение (2х-5)² - 3х²=(х+2)²-3​

Answer 1

${(2x - 5)}^{2} - 3 {x}^{2} = {(x + 2)}^{2} - 3 \\ 4 {x}^{2} - 20x + 25 - 3 {x}^{2} = {x}^{2} + 4x + 4 - 3 \\ 4 {x}^{2} - 3 {x}^{2} - {x}^{2} - 20x - 4x = 1 - 25 \\ - 24x = - 24 \\ x = 1$