Question

решите уравнение.Алгебра. (2x-5)*2-(2x-3)(2x+3)=15​

Answer 1

$(2x-5)^2-(2x-3)(2x+3)=15\\4x^2-40x+25-(4x^2-9)=15\\-40x+34=15\\40x=19\\x=frac{19}{40}\\x=0,225$