Question

Desenvolva as expressões algébricas a seguir:
a)(1+3x).(1-3x)
b)(6x+7y).(6x-7y)
c)(3x+y)^2
d)(2x-y)^3

Answer 1

a) (1+3x).(1-3x) =

1² - (3x)²

1 - 9x²

b) (6x+7y).(6x-7y) =

(6x)² - (7y)²

36x² - 49y²

c) (3x+y)^2 =

(3x)² + 2 . 3xy + y²

9x² + 6xy + y²