-3x(2x-x) + (3x+1)(x-2)= -3x(2x-x) + (3x+1)(x-2)= -3x(2x-x) + (3x^2 - 6x + x - 2)= -3x(2x-x) + (3x^2 - 5x - 2)= -3x(2x-x) + 3x^2 - 5x - 2= -3x(2x-x) + 3x^2 - 5x - 2= -3x(2x) -3x(-x) + 3x^2 - 5x - 2= -6x^2 + 3x^2 + 3x - 5x - 2= -3x^2 - 2x - 2
3(2x-1)^2 + 12x= 3(4x^2 - 4x + 1) + 12x= 12x^2 - 12x + 3 + 12x= 12x^2 + 3
(x+3)^2 - (x-2)(x+2)= (x^2 + 6x + 9) - (x^2 + 2x - 2x - 4)= x^2 + 6x + 9 - x^2 - 4= 6x + 5
-3x(2x-x) + (3x+1)(x-2)
= -3x(2x-x) + (3x+1)(x-2)
= -3x(2x-x) + (3x^2 - 6x + x - 2)
= -3x(2x-x) + (3x^2 - 5x - 2)
= -3x(2x-x) + 3x^2 - 5x - 2
= -3x(2x-x) + 3x^2 - 5x - 2
= -3x(2x) -3x(-x) + 3x^2 - 5x - 2
= -6x^2 + 3x^2 + 3x - 5x - 2
= -3x^2 - 2x - 2
3(2x-1)^2 + 12x
= 3(4x^2 - 4x + 1) + 12x
= 12x^2 - 12x + 3 + 12x
= 12x^2 + 3
(x+3)^2 - (x-2)(x+2)
= (x^2 + 6x + 9) - (x^2 + 2x - 2x - 4)
= x^2 + 6x + 9 - x^2 - 4
= 6x + 5