Question

a^2+b^2-c^2-d^2+2ab-2cd

Answer 1

$a^2 +b^2 -c^2 -d^2 +2ab -2cd$


$a^2 +b^2 +2ab -c^2 -d^2 -2cd$


$(a+b)^2 -1[ c^2 +d^2 + 2cd]$


$(a+b)^2 -1 [ (c+d)^2]$

$(a+b)^2 -(c+d)^2$

$[(a+b) - (c+d)] [(a+b) + (c+d)]$

$(a + b -c -d)(a +b +c+d)$




i hope this will help you



-by ABHAY