Question

Qual o desenvolvimento de:
a) ( 4a²b+3) . ( 4a²b-9)
b) (5x³+13) . (5x³-11)
c) (m² + 2/5 a) . ( m² - 1/3 a )

Answer 1

a) ( 4a²b+3) . ( 4a²b-9):
4a²b+3× -4a²b+9:
+3×-9:-27

b) (5x³+13) . (5x³-11)
5x³+13 . -5x³+11:
13×11:143

c)(m² + 2/5 a) . ( m² - 1/3 a )
m² + 2/5 a .- m² +1/3 a:
2/5×1/3:2/15