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

a)
= (x + 4)(x - 3) + 2
= x² - 3x + 4x - 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 + 5x + 10

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