Question

Resolva as multiplicaçoes de polinomios:
a)(x+2).(x+3)
b)(a-2).(a-7)
c)(2x-5).(3x-2)
d)(x+4).(x-3)+2

Answer 1

a)
= (x + 2).(x + 3)
= x² + 3x + 2x + 6
= x² + 5x + 6

**************************
b)
= (a - 2).(a - 7)
= a² - 7a - 2a - 2.(-7)
= a² - 9a  + 14

************************************
c)
= (2x - 5).(3x - 2)
= 2x.3x - 2.2x - 5.3x - 5.(-2)
= 6x² - 4x - 15x + 10
= 6x² - 19x + 10

**********************************
d)
= (x + 4).(x - 3)+2
= x² - 3x + 4x - 12 + 2
= x² + x - 10

**********************************************