Question

factorise m square+4m-8n+4n square-8mn

Answer 1

m² + 4m - 8n + 4n² - 8mn

= m² - 8mn + 4n² + 4m - 8n

$<b>a² - 2ab + b² = ( a + b )²</b>$

= ( m - n )² + 4m - 8n