Question

c) (1 - x)(1 + x)
e)
(4xy - 3)(4xy + 3)

Answer 1

Resposta:

c)(1-x)(1+x) = {(1)* (1) + (1) *(x)} {(-x)(-x)(+x)} =

1 + x- x-$x^{2}$=

1 - $x^{2}$ =

-$x^{2}$  = -1       (-1)

$x^{2}$=  1

$x = \sqrt{1}$

x = ± 1

e)  (4xy-3)(4xy +3) =

16$x^{2} y^{2}$ +12xy -12xy -9 =

16$x^{2} y^{2}$ -9

Explicação passo-a-passo: