Anonymous

(6x2 + 8x + 8) + (12x3 - 12x2 - 2x) = 12x3 - 6x2 + 6x + 8

Anonymous

= (6x² + 8x + 8) + (12x³ - 12x² - 2x) = 6x² + 8x + 8 + 12x³ - 12x² - 2x = 12x³ + 6x² - 12x² + 8x - 2x + 8 = 12x³ + (6x² - 12x²) + (8x - 2x) + 8 = 12x³ + (- 6x²) + (6x) + 8 = 12x³ - 6x² + 6x + 8

Anonymous

(6x2 + 8x + 8) + (12x3 - 12x2 - 2x) =6x² + 8x + 8 + 12x³ - 12x² - 2x = 12x³ + 6x² - 12x²+ 8x - 2x + 8 = 12x³ - 6x²+ 6x + 8

Anonymous

I see no polynomials, unless you are missing an exponentiation sign?

Anonymous

(6x2 + 8x + 8) + (12x3 - 12x2 - 2x). = 6X^2 + 8x + 8 + 12x^3 - 12x^2 - 2x = (6x^2 - 12x^2) + (8x - 2x) + 12x^3 + 8 = - 6x^2 + 6x + 12x^2 + 8 = 12x^3 - 6x^2 + 6x + 8