Question

Simplifique as expressões

(x+3)(x+4)-2(x+1)

3x(x-1)+(x+2)(x+5)

Answer 1

 1º)      (x+3)(x+4)-2(x+1)

=(x² + 4x +3x + 12)(-2x - 2)

=(x² + 7x + 12)(-2x - 2)

=-2x³ - 2x² - 14x² - 14 - 24x - 24

=-2x³ -16x² - 24x - 26

Answer 2

(x - 3)(x + 4) - 2(x + 1)
x² + 4x - 3x - 12 - 2x - 2
x² + 4x - 3x- 2x -12 -2
x² - x -14

3x(x - 1) + (x +2) (x+5)
3x² - 3x + x² + 5x + 2x + 10
3x² + x²  - 3x + 5x + 2x + 10
4x² + 5x + 10