x во второй степени=2x+3

X во второй степени=2x+3x² - 2x - 3 = 0x² + x - 3x - 3 = 0x * (x + 1) - 3(x + 1) = 0(x+1) * (x - 3) = 0x + 1 = 0x - 3 = 0x = -1x =3x₁= -1 , x₂ = 3