Question

1. A forma fatorada de a2 + 2ab + b2 – c2 é:
a) (a + b + c)(a – b – c)
b) (a + b + c)(a + b – c)

Answer 1

a² + 2ab + b² – c²

(a+b)² - c²

(a+b +c)(a+b -c) ====> b)