А) а*(x-4x+4)=a*( -3.5 - 4*(-3.5)+4) = a*( -3.5 + 14 +4 ) = 14.5*a б) -x*(12x^2 -12x+3 ) = -12x * ( x^2 -x + 0.25 ) = -12x ( x -0.5 )^2 = -12 * (-3.5) * * (-3.5-0.5) = 42 * ( -4 ) = -168