Question

-2x(-4+7x)+8x=3решити уравнение

Answer 1

8x-14$x^{2}$+8x=3
-14$x^{2}$+16x-3=0
D=16^2-4*14*3=88
x1=(-16-2$sqrt{22}$)/(-28)=(8+$sqrt{22}$)/14
x2=(8-$sqrt{22}$)/14