Question

b) (x-10)2 =
c) (a+ 3)(a-3) =
d) (x-1/10)(x+1/10) =
e) (5x-2)2 =
f) (m+10)(m-10) =
g) (x+2) =

Me ajudem!!!

Answer 1

Olá,

b)

$(x - 10 {)}^{2} = {x}^{2} - 2(10)(x) + {10}^{2}$

$= {x}^{2} - 20x + 100$

c)

$(a + 3)(a - 3) = {a}^{2} - 3a + 3a - {3}^{2}$

$= {a}^{2} - 9$

d)

$(x - \frac{1}{10} )(x + \frac{1}{10} ) = {x}^{2} - \frac{1}{10} x + \frac{1}{10} x - ( \frac{1}{10} {)}^{2}$

$= {x}^{2} - \frac{1}{100}$

e)

$(5x - 2 {)}^{2} = (5x {)}^{2} - 2(5x)(2) + {2}^{2}$

$= 25 {x}^{2} - 20x + 4$

f)

$(m + 10)(m - 10 {)}^{2} = {m}^{2} - 10m + 10m + {10}^{2}$

$= {m}^{2} - 100$

g)

$( x + 2) = x + 2$