Question

-a^2-2ab-b^29×1.2^2-16×1.4^21/2(a-b)a+1/2b·b

Answer 1

3( x + 1 ) - ( x + 1 )"

= ( x + 1 )( 3 - x - 1 )

= ( x + 1 )( 2 - x )

3( x - y ) - 2( x - y )"

= ( x - y )( 3 - 2x + 2y )

5m( a + b ) - a - b

= 5m( a + b ) - ( a + b )

= ( a + b )( 5m - 1 )

是否可以解决您的问题?