Question

N sei fazer,quem poder me ajuda agradeço

Answer 1

olá

a)

(x-10)^2=>
${a}^{2} - 2 .ab - b {}^{2}$
$x ^{2} - 2x.10 + 10 ^{2}$
$x ^{2} - 20x + 100$


b)

$(x + 9) ^{2} =$
$x ^{2} + 2x.9 + 9 ^{2}$
$x^{2} + 18x + 81$


c)

$(x + 1) ^{2} =$
$x ^{2} + 2x.1 + 1^{2}$
$x^{2} + 2x + 1$

d)

$(x + 3)^{2} - (x + 4)^{2}$
$(x + 3 - (x + 4)) \times (x + 3 + (x + 4))$
$(x + 3 - x - 4) \times (x + 3 + x + 4)$
$( - 1) \times (2x + 7)$
$- 1.(2x + 7)$


e)
$(x - 1)^{2} + (x + 6)^{2} - 2.(x + 3)^{2}$
$x^{2} - 2x + 1 + x^{2} + 12x + 36 - 2.(x^{2} + 6x + 9)$

$x^{2} - 2x + 1 + x^{2} + 12x + 36 - 2x^{2} - 12x - 18$
$0 - 2x + 9$
$- 2x + 19$