Упростите выражения: -3x(2-x)+(3x+1)(x-2) 3(2x-1)^2+12x=3(2x+4x+1)+12x (x+3)^2-(x-2)(x+2)

1 ) - 3 * x * ( 2 - x ) + ( 3 * x + 1 ) * ( x - 2 ) = 3 * x * ( х - 2 ) + ( 3 * x + 1 ) * ( x - 2 ) = ( х - 2 ) * ( 3 * х + ( 3 * x + 1 ) ) = ( х - 2 ) * ( 3 * х + 3 * x + 1 ) = ( х - 2 ) * ( 6 * х + 1 ) = 6 * x ^ 2 + x - 12 * x - 2 = 6 * x ^ 2 - 11 * x - 2 ;2 ) 3 * ( 2 * x - 1 ) ^ 2 + 12 * x = 3 * ( 4 * x ^ 2 - 4 * x + 1 ) + 12 * x = 12 * x ^ 2 - 12 * x + 3 + 12 * x = 12 * x ^ 2+ 3 ;3 )3 * ( 2 * x + 4 * x + 1 ) + 12 * x = 3 * ( 6 * x + 1 ) + 12 * x = 18 * x + 3 + 12 * x = 30 * x + 3 ;4 ) ( x + 3 ) ^ 2 - ( x - 2 ) * ( x + 2 ) = x ^ 2 + 6 * x + 9 - ( x ^ 2 - 4 ) = x ^ 2 + 6 * x + 9 - x ^ 2 + 4 = 6 * x + 13 ;