Question

4. Determine os produtos:

a) ( 8xy - 2 ) ( 8xy + 2 )
b) (1 + m² n³ ) ( 1 - m² n³)

Answer 1

Oiii

a)
$\boxed{(8xy - 2).(8xy + 2) = (8xy)^{2} - 2^{2} = \boxed{ (8xy)^{2} - 4}}$

b)
$(1 + m^{2} n^{3} ) ( 1 - m^{2} n^{2}) = 1-(m^{2}n^{3})^{2} 1-(m^{2})^{2}(n^{3})^{2} 1 - m^4(n^{3})^{2} \boxed{1-m^{4}n^{6}}$

Answer 2

Oi Nina

a) (8xy - 2)*(8xy + 2) = 64x²y² - 4 

b) (1 + m²n³)*(1 - m²n³) = 1 - m^4n^6) 

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