Решите уравнение 12-(4-х)^2=х(3-х)
(a-b)^2 = a^2 -2ab +b^2 12-(4-х)^2=х(3-х) 12 -(16 -8x +x^2) = 3x -x^2 12 -16 +8x -x^2 = 3x -x^2 -4 +8x -x^2 -3x +x^2 = 0 5x -4 = 0 5x = 4 x = 4/5
12-(16-8x+x^2)=3x-x^2, 12-16+8x-x^2-3x+x^2=0,-4+5x=0, 5x=4, x=4:5, x=0,8.