Question

simplifique a expressão:
(3x+2)² - 3(x-4)² -x (x-16)+(x-3)²

Answer 1

(3x+2)² - 3(x-4)² -x (x-16)+(x-3)²

9x² + 12x + 9 - 3x² + 24x - 48 - x² + 16 + x² - 6x + 9

6x² + 30x - 14    

Answer 2

$(3x + 2)^2 - 3*(x - 4)^2 - x * (x - 16) + (x -3)^2 \\ \\ 9x^2 + 12x + 4 -3 ( x^{2} -8x + 16) - ( x^{2} -16x) + x^{2} -6x +9 \\ \\ 9 x^{2} + 12x + 4 - 3 x^{2} + 24x - 48 + 10x + 9 \\ \\ 9 x^{2} + 12x + 4 - 3 x^{2} +34x -39 \\ \\ 6 x^{2} + 46x - 35$