Question

simplifique as expressões :
a) (x+4)(x-3)+2
b) (x+3) (x+4) -2 (x+1)
c) 3x (x-1) + (x+2) (x+5)

Answer 1

Simplifique as expressões :a)
 (x+4)(x-3)+2
(x² - 3x + 4x - 12) + 2
(x² + 1x - 12 ) + 2
x² + x - 12 + 2 
x² + x - 10




b)
 (x+3) (x+4) -2 (x+1)

(x² + 4x + 3x + 12) - 2x - 2
(x² + 7x + 12 )- 2x - 2
x² + 7x + 12 - 2x - 2
x² + 7x - 2x + 12 - 2
x² + 5x + 10


c)
3x (x-1) + (x+2) (x+5)
3x² - 3x + (x² + 5x + 2x + 10)
3x² - 3x + ( x² + 7x + 10)
3x² - 3x + x² + 7x + 10
3x² + x² - 3x + 7x + 10
4x² + 4x + 10