Question

1 ) desenvolva:

a ) ( x - a )²

b ) ( 5a - 3b )²

c ) ( x + 6 )²

d ) ( 2a + 10 )²

e ) ( a + 5 ) ( a - 5 )

f ) ( x+ √6 ) ( x - √6 )

Answer 1

Olá!!!

Resolução!!!

a)

= ( x - a )²
= ( x )² - 2 • x • a + ( a )²
= x² - 2xa + a²

b)

= ( 5a - 3b )²
= ( 5a )² - 2 • 5a • 3b + ( 3b )²
= 25a² - 30ab + 9b²

c)

= ( x + 6 )²
= ( x )² + 2 • x • 6 + 6²
= x² + 12x + 36

d)

= ( 2a + 10 )²
= ( 2a )² + 2 • 2a • 10 + 10²
= 4a² + 40a + 100

e)

= ( a + 5 ) ( a - 5 )
= ( a )² - 5²
= a² - 25

f)

= ( x + √6 ) ( x - √6 )
= ( x )² - ( √6 )²
= x² - 6

Espero ter ajudado!!!