Question

simplifique as expressões a) (x-1)²-(x-1)(x-1)
b) (2a-4)²-(a+2)²
c)(m-4)²-(m-1)²

Answer 1

simplifique as expressões

a)

(x-1)²-(x-1)(x-1) =>

(x-1)²-(x-1)²=>

=>0

b)

(2a-4)²-(a+2)² =>

=> ( 2a - 4 -( a+2 ) ) ( 2a - 4 + ( 2a+2 ) )=>

=> (2a - 4 - a -2 ) ( 2a - 4 + a + 2 )=>

=> ( a - 6 ) ( 3a - 2 )

c)

(m-4)²-(m-1)²=>

( m - 4 - ( m - 1 ) ) ( m - 4 + ( m - 1 ) )=>

( m - 4 - m + 1 ) ( m - 4 + m - 1 )=>

( - 3 ) ( 2 m - 5 )=>

- 3 * ( 2 m -5 )